I have a 2017 Sony Bravia and the screen is beautiful but the Android TV is slow and fills with ads and apps I can't remove. I don't connect it to Wifi and instead connect it to an Apple TV.
A few years ago, I started getting artifacts from Netflix when playing from Apple TV. After researching, I found the codecs in the TV were out of date. I connect to Wifi and updated Android TV, and everything has been peachy since. Ideally the TV would come ready to support HDR10 or whatever but that was not the case when I made my purchase.
TL;DR - streaming requires codecs and the TV may need an update to support the fancy, 18-bit color the TV is capable of but wasn't available at the time of purchase.
