Heh, same. I bought what was probably the last generation of dumb TVs. It's a 4k 65" panel from a company called Atyme which I believe is now defunct, made with an LCD panel that was part of some other company's manufacturing order but didn't pass quality check, and it has like 2010-ish TV electronics (you can tell because the settings menus look just like what you find on all the TVs from that period). It's 4k but it doesn't have any of the fancy features like HDR because the electronics are limited... but it also doesn't have a bootup delay, it just turns on.

I didn't learn about commercial signage displays until after I had bought it.