I have an older Vizio TV, was never connected to the internet but it does have wifi. Last year it started freezing up a lot, and I read that some people had resolved that problem by removing the wifi module. Since I never used it as anything but a dumb screen, I figured why not try it. I opened it up and did that, and it's been stable ever since.

yeah I just bought an apple tv appliance and my nice OLED samsung tv never gets anywhere near my wifi, except the first day I got it to update the firmware. It seems stable so the firmware will probably never be updated again in this or the next lifetime.