Given enough determination, you can learn how to locate antennas in the TV and remove them, which would render the TV dumb for all intents and purposes.
I have no experience with it, it just might be less work to remove antennas from any TV than finding a dumb TV in 2026.
I'm sure sooner or later TVs will demand to connect to an "activation server" before they start working. And soon after that continuous internet access.
You know, for your own protection of course. You wouldn't want to miss out on exciting content recommendation features and AI integration! Your life isn't complete without a constant guided tour of all the wonderful things surveillance capitalism has to offer, after all.
I have no experience with it, it just might be less work to remove antennas from any TV than finding a dumb TV in 2026.