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.
Youtube Music is probably the best for algorithmic recommendations and you can very easily block ads on it.
but if you want to try a different approach entirely, nothing beats just asking around for recommendations. If you find some people with similar taste as you to trade recommendations with, it is the most satisfying and fun way to discover new music.