I saw several other reports on this forum that Sony TVs were usable so I felt good about testing it out. I am NEVER EVER connecting this TV to the internet. An added benefit of that is better privacy since smart TVs are notoriously bad regarding data collection.
Good point about the minimum brightness potentially flickering. I don't have a way to test it but I will play it safe and just increase the brightness to 10%, and compensate in software (LightBulb).
I have tried multiple AMD GPUs and none of them have worked for me - Ryzen 6900, R9 280 discrete, Vega discrete, and an old Phenom X4. At this point I am just giving up on AMD.