FWIW I replaced my Samsung “smart” TV by a Nebula Mars video projector. It’s very convenient and let’s me forget I have it, tucked away and hidden most of the time. Yes it is “smart” but it’s Android and I can connect via adb to it to install apps like VLC, make it start on boot, etc. I’m not updating it.

Next time I do buy a replacement though I’ll verify first in forums if it can be rooted to have the level of control I need. Maybe there will be a OSHW equivalent to www.crowdsupply.com/open-tools/open-printer for video projectors as unfortunately it seems like a trend.