Which smart TV brands offer the longest software support?

When you spend a lot on on a TV, you expect it to last a while. But that support period varies wildly by manufacturer.

When you spend a lot on on a TV, you expect it to last a while. But that support period varies wildly by manufacturer. <p><img src="https://www.engadget.com/img/gallery/which-smart-tv-brands-offer-the-longest-software-support/intro-1791567894.jpg" /></p>