Interesting issue on the UI lag. My 2022 4K Sony has no lag whatsoever.

Vision persistence with high intensity light is an interesting phenomenon. This is why people still love CRTs, too. OLEDs do not create that much of a light by themselves, so no persistence of vision is present.

Also, why an audible click is so bothering? I can't fathom that part, sorry. Nitpicking much? BTW, I'd rather have a proper relay in my devices rather than a high-power MOSFET which can short and has a shorter lifespan.

Your comment reminds me a couple of blog posts. One person wrote a 2500 word essay on something they hated so much. Then the thing got tuned or serviced or something, then they wrote 3000 word essay on how they love it. The kicker? The feature they hated most in the first was the feature they loved the most in the second one.