[Hasu]

> so if you have some random local bands in your iTunes library, YOU CAN STILL ACCESS THOSE VIA APPLE MUSIC because AM will upload them into their cloud and allow you to access them because you have them in your local library. This is super cool; I don't think anyone else does this.

YouTube Music has this feature too - my library still has stuff I uploaded over 10 years ago that I can stream on my phone.

Spotify has a local files mode that used to be pretty good and allowed for syncing devices, but they've crippled it, made it harder to use, and hidden all references to it deep in submenus (at least this was the state of things the last time I used Spotify, it's been a couple years since I subscribed, I wouldn't be shocked if they've killed it entirely by now).