The thing that’s missing for me is discovery. Release Radar and the Discovery playlist and related artists on Spotify (for me) are currently top tier. I get introductions to artists no one else has with songs I often like. Last.fm used to do this? Maybe? But doesn’t seem like it anymore. Other streaming services, apple, tidal, quobuz, youtube, all seem lacking in one aspect or alter. Are there options on this?
Last.fm is still there and it's still supported by almost all players on linux. Even the ones that don't have a specific plugin for last.fm, there are player agnostic scrobbling clients. I wrote one for all MPRIS compatible players - which is basically all of them - and it includes other free services that work similarly to last.fm: libre.fm and ListenBrainz.