Lol... I made this point earlier to @
pemerton. That there are in fact things that can be accomplished by higher level PC's that can't be by lower level PC's (from a mechanical standpoint). The difference I think in the approaches, and maybe where @
pemerton ' s contention is, is that 4e tells you these things are part of the epic tier and they involve this specific fiction... while 5e says these are beyond the ken of certain men and you the DM decide what that is in your particular campaign. I think pemerton wants the game to define these things for him while I (and I think others) rea happy to decide what these things are for ourselves in any particular camapign.
The fact that official adventures seem to rarely if ever use these DC's (thus also not attaching a specific fiction to them) would seem to reinforce this notion of the DM defining what falls into those extreme DC's.
EDIT: I want a more mythical campaign... Fighters sticking their hands into forges of creation to hold an artifact while it is created become doable at high levels. More sword and sorcery... perhaps gigantic leaps and feats of extreme strength beyond those of most men become feasible at the higher end of the DC's.