I bought a mid-range Vizio about two years ago. Vizio has progressively made its OS more and more laggy every few months and filled it to the brim with unblockable ads. Software updates would regularly break things for a few days/weeks at a time until the changes get rolled back.

When Apple came out with their new Apple TV, I bought one, connected that to my TV, and disconnected my TV from the internet. Now life is good since the Apple TV is buttery smooth and does not have ads.