If the players are demanding wild results, especially if they're the kind to roll unprompted, then sure.

But in my experience, it's usually just a little flourish or a small bonus, which I think is fine.

And if the issue is that a nat 20 doesn't guarantee success, technically, sure, but I'd be more annoyed being asked to make a pointless roll. I know there are reasons, like a hidden target number, or other characters being able to do it, but in general, I'd rather just hear "no" than go through a pointless check.