I bought my first TV streaming device in 2015 and it was the 4th gen Apple TV. There are probably better products out there that are cheaper but it does everything I need it to. The only thing I dislike about the Apple TV is the remote, it's a garbage idea and product. Hopefully they will go with a different remote.
I'm ready for an upgrade as my 4th gen is struggling with the latest TVOS.
I had the 2nd generation AppleTV for years and it works great, no problems.
Finally replaced it with the latest 4th generation 4K version this past September, just before tvOS 13. It was okay, but I wasn't too impressed. The upgrade to tvOS 13 was a big leap forward!
The only problem we experience is the Netflix app slowing down to a crawl over time! So annoying! A reboot fixes that, but that should not be needed.