Apple TV - any experiences?

Hi

is anybody using an Apple TV (the 4K ?) as a LMS player? Any experiences? Are you using AirPlay or an app (http://slimlibrary.matglo.com/apple-tv-screenshots/, or are there others as well?)
Any suggestions?

I am asking, because I am thinking of buying an Apple TV and to retire my Pi to become the LMS server (older model - does it work?). The price difference is bearable, and it will also function as a plex client.

Suggestions?

Thanks,

Rainer