I never really liked exploring music on Spotify the back catalog was non existent for DJs putting out amazing stuff in the 90s and 00s. You get like 2010 all the way to current year. Worthless.
Spotify is great for recommendations of licensed content that is new. I rarely feel there is some small or big hit I'm missing in the genres I like, but it is heavily supplanted with the use of SoundCloud for sets and music that will never legally be licensed and on the platform.