I want tot go one further and say music cassettes. Love their sound and way more compact than vinyl. Sadly, there's no good new hardware being made at the moment, although I really like my We Are Rewind player, it's far from HiFi.
Nah, gotta got vinyl because cassettes deteriorate just sitting in their cases while vinyl stays pristine ... until you actually play it, anyway -- but if you want to store an audio recording for longevity, press a gold version of a vinyl album.
With both, it also matters how you store it. But like I said, (modern) cassettes are not for HiFi. If I really want to immerse myself in a record, I need the vinyl. The whole experience is just so much fun.