[CharlesW]

Apple has this in the form of a poorly-marketed feature called iTunes Match ($25/year). https://support.apple.com/en-us/108935

I no longer subscribe to Apple Music, but I have 169.5 days of purchased music that I can stream anywhere. Tracks that exactly match an entry in their catalog are presumably just represented as a pointer, and tracks which aren't available in Apple Music are uploaded.

[nukem222]

Readers should note that it's super buggy. Occasionally your music will be unavailable, even though it can match it to tracks that ARE available on apple music (it just says "not available in your region" and is greyed out). Sometimes it also "matches" to the clean version of the music (may god damn people who think that censoring music is a good idea) and there's no way to correct it. I've lost an impressive amount of music just forgetting what's mine and accidentally deleting it when trying to figure out why it's not playing.

It was half-baked when they shipped it and it still has the same launch bugs. Still, it's better than spotify.

[basisword]

It sounds like you're confusing iTunes Match and iCloud music library. I've been using iTunes Match for about 15 years and never had any issues. It's not matching your stuff with Apple Music (which didn't exist when Match launched).

[2big2fail_47]

for that case i'd just go with plexamp and self-host the music.