At the moment usually just a nag popup on power on.

Annoying but not a huge deal. I imagine this will slowly get worse as more people learn to not connect it to WiFi.

Also of course all the smart tv features don’t work, and a lot more folks than I ever imagined actually use the built in controller (usually some form of Android or Roku) to watch Netflix and whatnot. And a lot of folks actually do watch the built in TV “channels” a lot of vendors ship with.

It seems very few people buy an additional device like an Apple TV or Nvidia Shield.