For anyone wanting a console / steam link hardware replacement - get a raspberry pi. I run steam link on a 3b and a 4 and it’s amazing on both. I still have 2 steam link boxes from back in the day, but they have slower WiFi, are less stable, and still only work in 1080p. I have none of these issues streaming to the Raspberry Pis. Crispy 4k 60fps streaming.
You have to use a workaround due to some strange bug that Steam hasn’t fixed on linux, but it just means you need to launch it in a little of an abnormal way. After that, it’s ez peasy.