In my last position I managed the classroom technology for a university. We had a couple of 60-inch Panasonic plasma TVs from around 2010 that were still good and functional when I retired in 2019. And they were HEAVY!! Close to 200 pounds. We had to have the classroom walls reinforced to mount them. I agree, transporting with screen up or vertical was the only way to do it.
They're no longer available, having been replaced by OLED/QLED sets.