It seems most Steam users still prefer to buy games instead of using Gamepass. Microsoft made a push to get more PC Gamepass subscribers(they had a promotion with friend trials, might still be going) since there's huge potential for growth but I'm not sure how it's going.
For a game that I really care about, I'd prefer to never have its availability in question. Gamepass is great for letting me try stuff I'm curious about though.
I liked Gamepass, but I found I didn't really appreciate most of the games. It was like going to a buffet rather than a sit-down restaurant and enjoying one entree. Also they took away the $1 per month deal that you could get by canceling and re-subscribing the next day. :(