I think there are many options between music streaming and reverting to 70s technology for music discovery.

As an avid listener, I've been assiduously building a digital music library since the year 2000. I started buying physical CDs, mostly used and in bulk, only to find that they are an impossibly huge burden when moving countries, which I did twice in the intervening years. I slowly moved to digital by ripping everything I could lay my hands on to FLAC, doing my best to scan all the booklets into PDF along the way. I believe I'm mostly done with my local public library's CD stock - at least for the music that interests me. I dig deep in so-called world music and large collections like magazine compilations. I usually collect whole series and I have a soft spot for cover versions of important composers.

To host all this (around 10TB today), I am running a Synology server and I'm backing up the whole thing to Backblaze. Synology has helpful apps for all platforms that allow connecting and listening to the music. I am using an old tablet as music player, connected to portable speakers around the house. It works great!

It's been my pleasure to share music discoveries with my friends and family. What's missing is a very good way to navigate this massive library in the many dimensions of the music universe.