If you want obscure 80's music you can find archives of old 80's comp tapes from everything to folk to punk to experimental techno (https://contortyourself-cy.bandcamp.com/album/80s-undergroun...). I think the 90s+ has way more to offer in terms of just massive amounts of raw weird shit from bands most people never knew to begin with. You can stretch out and find all the sub-genres of a particular type, like electronica (https://beat.media/obscure-genres-of-electronica-you-need-to...) death metal (https://www.listchallenges.com/the-obscure-us-death-metal-10...) 90s UK indie (http://www.nme.com/photos/50-forgotten-90s-bands-who-prove-9...) or random French bands (https://frenchcrazy.com/2014/04/popular-100-french-songs.htm...), or do what most music nerds do and visit a record swap.
My interests have mostly shifted to history, cookery, materials engineering and gardening, so it's impossible to get bored. There's too much left to learn.