Today I tested Spotify in anbox on my way to work. Playing stuff online, i.e. not downloading the music first as I would usually do.
Didn’t notice any difference to using it on my main phone except that UT doesn’t have controls to play/pause/skip on the lock screen.
Not sure if that would work as a daily driver, though: during 50min the battery went down 16% (mobile data and wifi on, GPS and bluetooth off).