If you have the right situation for it, consider a projector. A decent projector and a much bigger than 65" fixed screen can be less than $1,000 combined. You won't be top of the line (maybe 1080p instead of 4k, and a "decent" quality screen), you need more darkness than a TV would require, you'll have to replace the bulb eventually, and installation is more involved.

But, for our needs (a handful of hours a week of focused watching or game playing), it's perfect. I wouldn't want this for casual TV watching or background TV watching, but that's just not how we consume (laptops or phones fill that role).

The projector is as dumb as can be, too, meaning nothing to connect to the internet, and nothing to update.

Just don't hook it to the Internet?

Seriously - it isn't that hard. I guess I'm old school - I have an AV receiver (it serves as an amp for my speakers too!) and it let's me pick between the few devices I have. Xbox for games/BluRay, Tivo or Apple TV - there aren't very many services that aren't on one of those three. I would NEVER hook a TV up to Internet. Maybe long enough to do a firmware update, but that's it.