Yes. Macrumors here says “don’t buy” [0], but only because they tend to recommend only if tech is “new”. I have this ATv gen and it’s not perfect, but is really the best streaming box, having used roku and nvidia shield. PS: get the version with wired ethernet if you can…wifi works, but no surprise that wired is more solid.
Gosh. I wish I knew. This thread is rife with alternatives, so other's guess is as good as mine. The unifi wifis I have running are still good and work extremely well. So my suggestion is to keep using them, but only if you host the controller software on your own hardware (I'm using RPi 4 as stated) and only if you avoid their cloud solution(s). (This IMO).
I am still looking for alternatives when the time comes to replace mine. Which I'll be forced to replace once/if they completely nerf the self hosted on self hardware options.
[0] https://www.macrumors.com/roundup/apple-tv/