I've heard perfection described as ephemeral. It's not impossible, not out of reach, just fleeting. Perfection can exist for a moment. You wake up and you're nowhere.

Is that really enough, though? If something is perfect if and only if no improvements can be made, then is not a perfect moment imperfect merely by its being suboptimal in contrast to a longer perfect moment?

I say no, any moment can be perfect.

Anything on top of that is in the realm of infinity plus one.