If you do this, connect it to the internet at least once, because most smart TVs ship with missing features that aren't activated until you do a firmware update.
Were I an enterprising enshittificator, I would certainly make sure to force being online as a prerequisite for basic functionality for any TV that has ever been seen online since that proves that it's capable of connecting. So.. be careful upgrading the shitware, you might get more functionality that you've bargained for. Functionality that you can't downgrade because you don't own the TV.
Hmm generally I want the smart tv to have as few features as possible, ideally never ever even show me their "home / launcher".
Kinda on the opposite recommendation that the fw it shipped with had to meet SOME minimally functional bar and every update after that is an opportunity to make it worse.