I'm still on a gtx 1080 for my main machine (alongside i7 9700) and it broadly still plays everything fine at high details. Though I'm very firmly still playing at 1920x1080 (or smaller - often 1680x1050 for games that benefit from playing in a window with maps/guides open).
But.
I really wouldn't be buying one now; it's simply too old and too many generations behind. That does leave the problem of what to replace it with... and there simply isn't anything in the current lineup that matches it for affordability (I bought it used at 18 months old for £150. Try getting anything like that now... it is just impossible).
I've always been a "buy a upper end card for £150 about 18 months after release" person... and that is going all the way back to the Diamond Stealth 3d 2000 and Voodoo 1 pairing from new. You just can't do that these days thanks to the crypto and now AI idiocy. We're trying to source A100 and H100 cards at work for scientific computing and most of our suppliers are quoting 12 month lead times on them... no discounts... and money up front to reserve them. The market has gone insane.... and despite what everyone says about prices falling, we are still seeing the impact on the consumer level from a few years ago - I can't see it going back to the 'good old days'.
My collection database and technical wiki:
https://www.target-earth.net