I've been collecting 1970s East European and Soviet jazz & progressive rock for many years. As well as pre-1970 "academic" electronic music. So many world-class artists who are virtually unknown in the West. Really, a whole new world of music.
So when people talk about Qobuz and Tidal as being Celestial Jukeboxes, I have to differ. Both have at best a 10% hit ratio when I try to stream digital versions of my favorite artists in these genres.
Same goes for a lot of Western European Rock in Opposition releases from the same period. 1973's "Z=7L" is a world-class album by the French post-Magma band Zao, which featured the incredible saxophonist Yochk'o Seffer.
I have a shelf of these albums obtained during the Cold War years by trading American CDs for Euro vinyl and by snapping up Cuneiform imports. But if I'd been limited to what's available on modern streaming services (other than, gulp!, Youtube) it would have been impossible to hear any of these records.