A level 1 caster can cast spells, let alone an infinite amount of times, bending the fabric of reality. An average, even highly trained person can't do that.
A level 2 druid can change into a bear. don't know many high trained real people that can do that
A 3rd level barbarian can take more abuse than a rhino
A 4th level fighter can routinely go toe to toe and win against a brown bear with nothing more than a sword.
etc, etc
Not sure what you think highly trained real life people can do, but I've never seen any actual equivalent examples.
Of course, none of the magical stuff will have any equivalent in the real world, because magic isn't real. Bit of a spurious example there. Does 5e have stats for rhinos? I'm curious as to whether that claim--"can take more abuse than a rhino"--is in fact objectively true in 5e, and not merely an estimate or hyperbole. I'm not exactly sold on the Fighter 4 vs. Brown Bear thing--34 HP is pretty beefy (a +2 Con Fighter is only going to have 12+8*3 = 36 hp), and the bear can make two attacks per round while the Fighter can't--and with "nothing more than a sword" (and armor), he wouldn't have the extra AC of a shield, nor the bonus-action attack of an off-hand weapon.
Besides things like regeneration and taking/inflicting more damage than an elephant?
Compared to the completely fantastical effects even an 8th level wizard can pump out? (Greater Invisibility, Mordenkainen's Private Sanctum, Polymorph, Stoneskin, Blight, just to name a few...) Yeah, I'd say that's pretty gorram mundane. Especially when anybody can get roughly equivalent "regeneration" just by taking an hour-long nap--and injuries are typically removed by a night's rest.
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As for the poll itself: I haven't voted, because I honestly don't really know. I've had literally no opportunity to play beyond, very roughly, 8th level in
any game except Dungeon World, which is inherently a fairly low-power game as it is (certain max-level spells aside--I'm looking at
you, Repair). I'm sort of torn between two desires. On the one hand, I really like the idea of a "sweet spot" that's intentionally been expanded to cover most, if not all, of the game's levels. The earliest levels are for learning the ropes, or for feeling out the character you're playing, but after that, it's awesome adventure the whole way.
On the other hand, I like the idea that a story expands in scope and impact, too. 4e handles that with the intentional ratcheting-up of the kinds of enemies you face as you proceed through the tiers (or half-tiers). In my Dungeon World game, we've more or less achieved the same thing (going from facing mercs and brigands and being scared by ghouls to defeating wizard armies and god-like beings and negotiating with Death himself), but I suspect that's more because I have a great DM than because Dungeon World naturally supports that sort of thing.
So I guess, but can't say for sure, that I like all of them, as long as I always feel like I can experience a similar "play-feel" as the levels go by while still feeling that the scope and impact of my actions has grown.