This makes me wonder if my local McDonalds, which has three big screens mounted vertically in the drive-thru, ended up with not the commercial grade ones. They’re cooking in the sun in a hot climate all day, so they fail and turn into flickery messes, and it seems like they’re on a cycle of roughly 3 months newly-replaced & working, 1 year flickering.

They’re probably inside commercial displays - not outdoor rated, which are much, much more expensive (and usually look much worse).