I bought a 96k/24 bit copy of Abbey Road at HD Tracks and was appalled at how much the sound of the original LP had been changed. I wrote about this at length in another thread a while ago. Yes, it sounded very open and detailed but it sounded completely different and the bass was way down in the mix. It would be nice to be able to just have someone remaster from the original analog mixes and getting it to sound as close to the vinyl as possible.
Spotify is weird in how albums can just disappear overnight. As a Captain Beefheart fan I was appalled to find out recently that Trout Mask Replica is no longer on Spotify but the rest of his catalog for Warner Brothers is still in print. There are playlists out there made by users that try to recreate albums that Spotify no longer has by locating each track on some other album. Then there are albums that are present but with one or more tracks missing. Early on I created a playlist of the four albums by Gryphon but a few months later when I went to listen to it again the albums were gone. Then a couple of years later, they were back. In some cases the same album may be available in multiple versions, each remastered at a different time so each sounds different.
To be totally honest I keep a lot of bootleg recordings stored on my NAS. These were downloaded from blogs, usually copied from rare old LPs rather than recent CDs, the majority are not in print anywhere on CD or LP and most of the downloads were done before streaming services were in existence. Most bloggers included scans of the original jackets (so you can read the liner notes) and text files of the personnel as well, something not available on Spotify for sure.