Justice and Rule
Legend
it also stops interchangeability of adventures. With 5e and 1D&D you can use adventures of either version with either core. With a jump from 3e to 4e you cannot - and if there is no jump and all you do is change the label to 5.5 while 1D&D otherwise stays the same, then that is horrible marketing.
What? No, what stops the interchangeability of adventures is mechanical differences, not a little number. 1D&D doesn't need to change everything to fix a bunch of problems, and it can still stay relatively compatible to the adventures that came before. The important thing would be to change the player-facing things, of which there is significantly less content (Basically 3 big books: PHB, Xanathar's, and Tasha's) while keeping things close enough that you can use all the old adventure stuff.
Also if you just change the label, that's not bad marketing as much as adding to clarity and making for a more defined product. In not making that jump, you are just creating a situation where you're going to have two versions of most things and you're going to have to hash out everything anyways. It's just going to make for a whole bunch of confusion as people are going to want to find what they want from each book rather than actually being forced to use what might be nerfed but ultimately better balanced in 2024.
WotC is really in a no win situation here. The term edition has been so misused so much by D&D over the years, that it has no actual meaning. No mater how they use it, there will inevitably be people who claim they are using it wrong.
I really think that their plan of dropping edition numbers is the best one. It undercuts most of the edition talk by just claiming there are no editions anymore, its all just "evergreen" D&D.
I'd argue the opposite, that basically putting a bunch of newly-balanced stuff into the pool without cleaning out the old stuff is just going to create a great confusing kludge, where certain people will argue about which classes to use from which editions and what have you. To me, the freakout over "edition" is largely on WotC for not saying "Well, we're changing things and we think we'll be better for it" and instead saying "You can just use whatever you like!"