Most of my “PS5” games are actually PS4 games with extra features/enhancements when played on the PS5.
I own only 1 game that was built for and is only available on a PS5: Demon’s Souls. Which, other than Bloodborne, was the primary reason I got the console in the first place.
It doesn’t just sit around gathering dust, like some others have stated. Since my PC is getting old and increasingly more unsupported by newer games, if I pirate a thing/play a demo on PC and it runs poorly (and I also like it enough to want it), I’m more likely to get it on the console if it’s not a multiplayer game.