I think a survey would be needed to correctly understand definition of a dumb tv. To me, a dumb tv is actually equivalent to a dumb monitor but with a remote and without a tuner or audio IO/speakers.

All that stuff is easy to not use. Anecdotally, everyone I’ve spoken to wants a fully functioning TV that they can plug their own devices into since they’re going to plug an AppleTV/XBox/PlayStation/Roku/Chromecast into it anyways.

If you want to use your own speakers or external video input switcher or whatever then you can still do that, just like you could before, but not including multiple inputs or speakers on a dumb set makes it an incredibly niche product.

The TVs coming out today are great if they just ditched the smart aspect of it.

I just want a display. No speakers please. No buttons or menus to fiddle with to select output.