HTPCs are cheaper and easier than ever. With tons of TV being broadcast by streaming, a browser gets you pretty much anything you could want. Grab a cheap mini PC and a wireless keyboard/trackpad combo, and you don't have to deal with your "smart" TV's "quirks". If you hit a good deal, the whole setup could end up under $200.
Plus an HTPC can use a VPN, adblocker, browser extensions, etc. So the overall experience is so much better than the underpowered SBC those smart TVs have, and all without the ads and spyware.
And if you're still not satisfied, grab a couple of bluetooth controllers and load up some light gaming. Even a mini PC with something like an N150 can handle stuff like Minecraft and Jackbox games.
I'll be holding on to my last dumb TVs for as long as they still turn on.