I have a Roku, the “smart tv” I have is absolute trash and takes several minutes to start up the app based functionality. Once it starts, it’s glacially slow.
I’m sure newer tvs are faster, however I also have no desire to see my panel hit EOL due to a lack of software support when it works perfectly fine. TVs can last for years, and I see no reason why I should look to upgrade on a smartphone level lifecycle, when a reasonable dedicated streaming device is priced below $50.