This concept of friction needs to be seen in other contexts to grasp what Wizards of the Coast is after. Let's look next door at Blizzard Entertainment.
You can see that friction is clearly on the mind of the Dangerhairs and Remorseful Trolls at Blizzard.
While what I've embedded above is supposition, it is clearly informed supposition and likely is 80% correct given both present trends and past performance. The Retail game, the one that's all whatever it is coming out of the Political Commissar's Office there this week, is very much a disposable and seasonal game now; you play the patch, not the game, and if it weren't so loaded with Fear Of Missing Out triggers you'd be able to come and go at will (much like FF14).
The argument being made here--that the new Classic rollout is to deliberately silo the legacy audience into their own paypig pen so that Retail can become whatever the Dangerhair Brigade wants it to be without fear or shame (or expectation of shouldering the company, i.e. consequence free if a failure) is mostly correct.
What's wrong is the idea that this is where new players will go. No, that's for Retail.
Why? Retail is being made increasingly frictionless. Normies, Casuals, Tourists- they go where friction doesn't exist. That's why WOTC wants them too. Make your game piss-easy to play--Free To Play, No Scheduling Your Fun, Lots Of Pay For Convenience (that is often Pay To Win in Asian titles; they love to flex like that for some reason)--and Normies (et. al.) swarm you, but are fickle and fair-weather so you need to keep them coming back frequently with new stuff. This is the basis for the Seasonal Model: MAXIMIZED NOVELTY!
If Retail WOW goes this route, all of the things legacy players claim to hate (but, via Revealed Preferences, show that they do not) are going to be maxed out and present trends (such as AI party members) will be fully standardized such as by making their use mandatory for a first-time through an instanced content option (and it will be sold as "The Story Mode"). Crafting, gathering, etc. will be depreciated in favor of doubling-down further on Doing Stuff (dungeons, Delves, raids, PVP, etc.) that can take no more than an hour- and that's for clearing a raid, so for everything else it 30 minutes or less- often a lot less.
In Tabletop, this translates to WOTC pivoting iteratively (drawing it out over years, not all at once via an edition change) to the things I mentioned: AI DMs and party members, gameplay being based on the Encounter and not Adventures or Campaigns (and Encounters being timed at 5-10 minutes so you can do them on a smoke break at work on your phone), paid enhancements for convenience (e.g. pay to Never Fail Saving Throws), and plenty of Branded tie-ins (oh look the Ninja archetype got a new subtype thanks to the Naruto/Boruto collab, and you can adventure out of the Hidden Leaf Village now) to keep drawing in new (and luring back lapsed) players.
Frictionless Convenince means that All Content Is Always Available on the player's side. You want to play using the Newtype rules for the Psion class, have a background with the Swordmasters of Ginaz, be the daughter of Storm Shadow, and fight with a lightsaber? You can, because Restrictions Are Friction and Big Gaming doesn't want to scare the Normies.
Frictionless Convenience on the Referee's side doesn't exist because WOTC's taken the Referee out back, shoved him into the ditch, and shot him in the head. The bots do that now, and so long as what the players want is Brand Safe it's AOK! Sure, the bots can only do what WOTC allows, but most Normies won't go beyond that anyway (and never have) so this is no drawback for WOTC.
This also means that WOTC is, within a decade (maybe within five years), going to be like Blizzard in the hunting down of alternatives.
Unlike Blizzard, WOTC won't be siccing Attack Lawyers on Your Temu D&D. What they will sic them on is attempts to breach their Walled Garden, in the form of trying to make content for The Only Game That Matters, and the Temu D&D crowd will do it because with the gates to the garden being shut and a gatekeeper installed it'll be like USAID money drying up: lots of people who front like they matter are going to start closing shop or lashing out because they can't suck off WOTC's teats or eat WOTC's scraps anymore. They are also going to find out how badly they needed WOTC for acquiring customers because this new Universes Beyond scheme kills their core offering: We Have The Fantasy WOTC Doesn't.
Which brings me back to Ryan Dancey and his 1999 revelation of Network Effects.
Part-and-parcel of that revelation is that Normies don't want to waste time relearning How To D&D. That's because they see ALL of Tabletop as D&D, and every Cargo Cultist pretending to be a publisher knows it- the more honest ones confess it. (Yes, MMOs are still the same way; all of them are WOW.)
Every single difference is a point of friction. Points of friction add up to Quit Moments VERY FAST for Normies. That's why they never take up alternatives, but instead kitbash D&D into what they want- assuming they bother at all, and very few do. They instead just quit the hobby entirely, something that happened with increasing frequency over the last 50 years as competing media began being able to give them the less-frictive alternative media offerings that they wanted out of D&D but did not get. They didn't see any other Tabletop product as something other than a D&D knockoff, so they assumed that they were all the same and thus a waste of time. Oldfags did not do jack shit to dispel this mistaken notion. (They say they did, but their actions proved that they did not.)
This is why WOTC's gambit will succeed if they can figure the tech end out. Now that vibe-coding is a thing, that's far more likely to happen such that I can count on it being the case; the Dangerhairs can vibe-code to Minimum Viable Product state, hand it off to someone who knows what he's doing with code (and it will be a man, since we know there is no woman or Jeet with the skills needed available over there) to finish it as Work For Hire, and then be on call when the H-1B maintaining it inevitably fucks it up (usually by subcontracing it to his cousins back home on the downlow against company regulations and in return for kickbacks).
Yes, there will be the legacy game we know. It will be depreciated in perpetuity, siloed into its own paypig pen (because that's what buying PDFs and PODs on Drivethru is), in favor of the mobile-friendly game where you play by the Encounter and may or may not have other players in your party- like you will know or care, as you're in it for Phat Loot and whatever else counts as high status play by then and they will never listen to your pitches because they're moving between one-shotting Storm Shadow to farm for his sword, doing Ranked in Apex with the boys, stream-sniping Dr. Disrespect in Warzone for lulz, and having Netflix on a second monitor playing at 2x speed- and you want that guy (or gal, or whatever they think they are this week) to show up at a specific time and place to do the same fundamental activity, but slower? Bitch are you high?
No, you Cargo Cultists get Unlimited L Works now due to this.
There is a way out, but that means admitting Jeffro Johnson and the Bros were right about everything and you are nowhere near ready for that ego-death yet.