I'd love to use a smart TV as designed (assuming half decent UX), but because I can't trust manufacturers to not push an update that starts showing me ads I ins

I'd love to use a smart TV as designed (assuming half decent UX), but because I can't trust manufacturers to not push an update that starts showing me ads I instead never give them internet access and use a chromecast or my PS4 for smart functionality instead. I do also prefer the incremental upgradeability you get by keeping display tech and software separate. I can avoid spending 4/5 digit $s on my big dumb screen for way longer when I can just upgrade a $50 dongle periodically (although it turns out google is way better at supporting old chromecasts than most smart TV manufacturers are at supporting software on old TVs).