Not much better than Electron IMO. Apple Music in the browser seems like there isn't much hope of a truly native experience now.
It's not as bad as a full web app
Yes, creating a new user resolves the problem. Yes, resetting my device to factory settings without restoring from backup resolves the problem.
How do I resolve the problem without deleting my entire history?
If not, then you start poking about in Application Support for the app.
The whole process took the better part of a day. It was long, it was tedious, but at least I got there in the end. There was no paid-support story that would have done this for me, but hey ho, it all worked out. I can't imagine I'll ever have the time to go through that much effort again.
The same cant be said for my iMessage history on my iPhone, which has been lost repeatedly as the only solution was "don't restore from your backup".
The Music app is still some sort of Frankenstein iTunes thing. The Library section views are native. The Apple Music section is still web. It is still slow compared to Spotify but much better compared to how it is in iTunes.