For years it had frame rate issues. Every second or so when watching eg Netflix you would see a micro stutter if the content wasn't at 24fps (eg PAL content at 25fps). I think this was improved recently but it's been years since I've used the Shield for anything but Plex.
As for Plex I've had way too many issues to list. Networking issues, having to restart the Plex app after the device went to sleep, etc. When I switched to using Plex on the Apple TV all the issues went away.
It should be noted that I have re-pasted and cleaned the dust of my Shield a couple of times since I got it 10 years ago.
Probably one of the big issues here. It's probably still the best Android TV you can get today but that's really sad because the SoC in it came out in 2015 (with some improvements in 2019). It was probably worse than what was in Apple TV at the time and Apple refreshed it two times since then.
I held off on buying it for many years because of the chorus of people saying, "Once the Switch 2 comes out, we'll get a new one!" (the line of thinking being that the Nvidia Shield used the same custom SoC as the Switch 1).
Switch 2 is out, no new Shield in sight. And the Shield TV Pro is still $200...
I doubt it. That SOC is still overkill for video (which I believe powered the Nintendo Switch 1). I think the big issue is really a combination of the Nvidia software and just terrible Android TV.
