I have a Sony Bravia I bought a few years ago. It was 'smart' but before the switch to Android. Since I had everything I needed with various STBs and a streaming pc, it took a couple years before I remembered the smart functions and became curious about them. So I set up the Internet connection and checked it out. What a dog's breakfast! I mean really, what a load of crap. How anyone at Sony could think this rubbish would be a selling point I will never understand. After making sure I wasn't missing anything I disconnected it again and went back to using it as a dumb monitor.
Today's smart TVs are undoubtedly much better but I still wouldn't waste my time on them. Dedicated external boxes are the only way to go. When I upgrade the Sony (which has an excellent picture, by the way) I will only look for screen size. The rest is just marketing noise. In the meantime, an Android TV box with Kodi, Chromecast, and increasingly infrequently, my streaming pc, do everything I would ever want.