I use listen brainz for music discovery. Every week it generates a jams playlist(similar to things i am known to like) and an exploration playlist(a bit more out there in terms of music taste). I then download those via the API and convert them to a CSV which gets put into SLSK download and all the music shows up in my music player automatically and I delete the songs if I dont like em. I was able to import my spotify listening history into it so I have a few 100k listens and its got a good idea of what I like.

Either my kids ask for something new, or i hit billboard charts once in a while and true up my collection.

I like to use the time filter and can listen in 5 languages; “oldies” in various genres, times, and places, isn't that hard to research--plenty of free internet radio out there.

Sorry to the new bands out there.

Edit: Also I find the mindset of finding the exact best music is kind of unhealthy. Building a tolerance for meh actually helps me discover things that don't immediately and instantly appeal to me, and I think that leads to more musical variety in the long run than the skip-happy attitude streaming encourages.