If you can't actually download a copy of a digital content as a mere file, then you can't really host it and serve it.
You can't host your own Spotify-clone even if you are allowed to listen to songs. However, you can still download music on Bandcamp to feed your Spotify-clone.
You can't host your own your own digital Video Game Store usually because of various DRM, or because it's painful to "export" the content and painful to "import" it back.
Still on the video game side, You can't even backup your game save (at least on the Nintendo Switch, Nintendo Switch 2 and Xbox Series), it's not because of any copyright infringement or IPs misuse, it's only a way for them to get more online subscription with online game save backup.
There is still a positive side: when it will become impossible to legally own anything, I'm pretty sure some illegal system will enable you to have a massive library of whatever you want at the cost of few clicks and/or a couple of bucks. I'm saying "positive side" even though it's illegal because I mostly talk about the comfort of having your own local library.