Honestly it's better than constantly rolling to check for traps.

Hard disagree, totally not a waste

You say that, but that flip was so cool that even the monsters were impressed and secretly wanted to be friends with the rogue. A BBG was created in this moment because one of them was super jealous and tried to do a cool flip as well but all eyes were on the rogues this day

See, this is why we should all switch to Ninja Burger, where Doing A Cool Flip is basically a core mechanic.

Wasted?! How dare you...

The worst wasted nat 20 is the one on a Perception check when the coast is clear.

Wasted? WASTED? I'll have you know that a proper flourish or cool entrance is the best possible use for a Nat 20!

I once got a nat 20 when I tried to take off my underwear without taking off my pants. The DM made very clear before I attempted it that anything other than a nat 20 would mean that I castrated myself