You were able to block everything in the past but no longer. Samsung catched on and now serves some ads over the same domains they distribute their firmware updates, install apps, get the program guide, and check the online status.
If you block those domains the Samsung TV loses most of its internet features and also seems to go crazy and requests all domains multiple times per second, defeating deep sleep of the TV.
I think: monitor + DVB decoder + Raspberry PI.
It will be the end of privacy completely. EVERYTHING always on and serving ads, collecting telemetry and logging everything. There will be no way to shut them down.
My TV has been relieved of all internet connection privileges, and it's staying that way.
Most people already don't care and happily connect everything to their Wi-Fi. Those that do care and now setup firewalls/piholes/etc. on their Wi-Fi will learn to snip the coax/desolder/drill out the 5G antenna in the future.
[1] https://www.samsung.com/uk/support/tv-audio-video/how-do-i-u...