Then you will have to deal with their shitty, laggy UI. Signage TVs are not more expensive from what I have seen. They often have less features though like only 60 Hz and fewer inputs (mine only has two).

Because nobody buys them? I have a reasonably nice 1080p60 dumb TV, and when I decide I want to upgrade, I’ll be looking at 4k (or maybe 8k) signage displays. Being part of an app ecosystem at this point is a design defect on a TV, and the superior product costs more, so fewer people buy it.

I also suspect the usable life of a smart TV is a lot lower, to the point that paying twice as much for a signage TV may not equate to twice the price in the long run. Fewer parts outside the panel that can slow down or fail entirely

Can’t find one with an OLED screen and I doubt there are any since that would likely lead to burn in. I can’t see a use case for low latency (assuming for gaming) on a signage TV so likely no. But for watching content, they work fine.

Because they are not getting any money off selling your data.