I have one latest generation and another earlier generation. I had been using another 2nd generation. Frankly they all have been buggy as heck. I don't know if it is Apple, or the various apps not playing nice with the AppleTV iOS/firmware.
Half the time I can't back out of a tv show I'm watching, to switch to another tv show/movie within the same service/app. Yes, I can get to the desktop, and use another app. But relaunching the app. I was using it brings me back to the TV/show or movie I was watching.
This happens across several apps. that I use to watch tv shows or movies.
I suppose I should do a total reset on the new, and older AppleTV I'm using. But what a pain to sign in to all the various service accounts. I wish there was a password services app. for the Apple TV.
While I'm at it, I wish there was a way to better find shows I watch in one place. Half the time I can't remember what service is hosting what I'm trying to return to. Siri BTW isn't so great to find them. If Siri does find them there usually is a complication about which service I'm using for the particular movie I'm trying to start viewing again.
I guess what I would like to see is a place where I could "pin" my current tv shows and movies, and then delete them after I'm done. "Up Next" is too weak IMHO.