[kitsunesoba]

Some TVs allow firmware updates via USB thumb drive, which I think is a feature worth selecting for. This allowed me to get some bug fixes for my Sony Bravia TV that I would’ve had to live without had updates been online-only.

Additionally, there are some models that come with nearly-stock Android TV that are easy to remove creepware from (just plug into laptop and remove with ADB) should one feel inclined to use built-in smarts.

Personally I’ve been using an Apple TV and it’s served me well.

[jasomill]

I'd be willing to bet that all modern TVs support local offline firmware updates.

Whether the actual firmware update binaries are readily available to non-commercial end users is another matter entirely (and of course equally important!).

In the case of my recent-ish LG model, they are, and offline USB updates work fine.