If they still designed raids like Classic raids, raiding would've died a decade ago.
Raid content evolved to match players, not the other way around.
Classic raiding with its 40-man teams becoming more popular than raiding in the game that's getting new fights regularly and offers a literal tourist mode (easy fights with fewer mechanics) without the need of 39 other players? I'd like to see that.
This feels mostly as if some people would love for fights to be less demanding so they'd have an easier time with them. Those people will have Classic soon enough.
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They you don't foresee the future but rather what you believe based in your own bias.
There will 100% be players returning. Be it Hunters for the taming of Blood Beasts, Transmog hunters, Meta achievement groups.