The sentiment here on HN is to never connect the TV to the Internet and instead use a digital media player or external streaming device. I wholeheartedly agree. But then several people mentioned wanting to update the firmware. If you'll never connect it to the Internet, then you should never update the firmware either. It goes against conventional wisdom, but updating the firmware in this situation is more likely to cause problems than to bring you desired improvements.

The firmware update might have stricter DRM controls; it could have a tricky new way to exfiltrate data out via your streaming box; maybe the firmware update itself contains some static ads; perhaps in the near future we'll have public wifi or free Google community wifi, and the new firmware will have the smarts to use that and bypass your wifi.

And these days, once you update the firmware, you often cannot revert back to earlier firmware.