i dont have an LG, but I've only had to firmware update 1 TV in like.. the past 13 years, and that was because it had a horrible issue with the image vertically splitting in half and green corruption across the bottom. Which makes you think hardware failure, but it wasnt, the firmware update 100% fixed it for the rest of its life.

So unless you are facing a major, catastrophic issue like that, I'd say fuck updates.