I find that I can only find about 90 percent of what I want to listen to. That's more than enough of a burden to opt out entirely. Live albums, demos, collabs, and obscure dead bands you can't really find with great success
Yeah I've never fully switched to Spotify because of that but I do like their library and ease of use, the playlist function we use for parties a lot and it's just easy and everyone understands it already.
As a Phish head and purveyor of bootlegs, and sometimes specific masters of classic albums, my personal music collection has always been a sacred space.