Ah, I get it. I don't like integration of this sort, because it quietly screams "lock in", but do I see how it can be very convenient. So I make do with my own, likely inferior, using Syncthing, and Google Photos for browsing. My music is mostly CD rips, Bandcamp, and some YouTube, and I don't do TV, so it's just easier for me than for normal folks. I can listen to my collection anywhere over a Wireguard connection on my laptop or my phone.

It's a different set of trade-offs; less polish, more control.