I want to get off spotify, but I want a way to discover new music, and be notified of new music from bands I listen to. I don't want ads, and I'm fine with piracy so long it is a relatively painless experience. Something like stremio but for music.
My dream service would be one that could recommend music based on a given song, and provide details about the artist and things. And even better version would have an API I could tap into so I could connect the service to music assistant. Hell I'll make a (mostly) locally hosted version of the spotify dj if I can.
Regarding discovery specifically, this sounds ridiculous but genuinely Youtube is pretty decent for it. You just need to punch in some more obscure stuff you already like (preferably in a clean session) and it often does pull up relatively interesting recommendations.
PipePipe for ad-free YouTube on mobile + ultradiskopanorama channel for the jams