"Let me lay some Harry Potter logic on you: 'never trust anything if you can't see where it keeps its brain'."
This is actually very good advice (I've probably got the quote wrong but I digress). You're going to encounter abandoned products everywhere in smart tech; I wound up buying a Roku box and a dumb TV instead. It's a good combination - Roku is popular enough that the apps/channels are kept up to date, and I never need to worry that my TV will lose its features in a few years. If the Roku box shuffles out of support, it's cheaper to replace that than the TV.
So the recommendation - don't bother with a smart TV unless you really need it to be all in one, and buy a smart add-on box instead.
A computer monitor won’t work either due to no IR Remote.
There are TVs with Roku software...
That said can you still push software updates without manufacturer involvement? That is “big Linux kernel bug, no need to wait for TCL/Sharp/Philips to approve or block the patches after we’ve done the QA”?
Or is it more like the (very bad) patching situation with android devices, where the hardware vendors delay or simply ignore upstream patches?