Framework's USP is not making simple products, it's making repairable and customisable ones. I don't think there's anything to do there with a TV – there aren't bits you want to replace unless you make it a smart TV where you can replace "the smart" or "the TV" in it independently. You could make the I/O modular, but there's also no reason to not just include a ton of I/O on a TV because it's already huge and HDMI sockets are cheap.

The other issue here is that if you remove the crap/apps/smart/etc, you have to charge more, because TVs are typically subsidised by the post-purchase revenue flow that you can get from those features. Most people won't pay more for a TV that lacks features, that's a very niche market of HN commenters, and Framework have been explicit in wanting to move to less niche markets.