This is a pretty interesting point. I mean, we can contrast it with say Diablo II, and Diablo II: LoD, where adding Act V didn’t completely make Chaos Sanctuary runs useless, nor Andariel or Mephisto runs, at least with regards to MF. And in later patches, CS runs have even been shown to be better XP/run for certain level ranges.
With WoW, expansions have added more content, but effectively making old content obsolete. There also has been a sort of lack of continuity, and you end up with odd leftovers like class trainers, that serve no purpose, but are still there.
I don’t know what this means precisely, but obviously “no,” is the answer.
In any case, my point was that we have had the evolution of WoW over the past 15+ years, which has brought us to Retail, and now to Retail + Classic.
I have some expectations that Shadowlands will actually be pretty good, and hope that we move into a better direction going forward. However, at the same time, playing Classic has shown me that there are some things that I prefer about Retail. Arenas are far more compelling end game PvP than anything in Classic, though if you’re Horde on Faerlina, the Classic Dueler’s League would be interesting (it would also be a lot of work and preparation), and Mythic+ instances give much better repeatability than Classic instances have (sure, so do Heroic instances that can be found in BC, but M+ gives continual progression).
And, of course, there are some things I don’t particularly like about Retail. For example, I hate that there are 4 raid tiers. I think that having an LFR tier does not enhance the experience, by allowing those who would not otherwise experience the raid to be able to, but rather detracts from the experience.
There are a bunch of other things, and I don’t particularly like the current Azerite gear nor neck pieces. Truth be told, I have never really liked gearing in WoW. I think Diablo II did a much, much better job of making gear the central part of the game, whereas with WoW it was the Character, and in modern Retail it is now the Account.