It used to be that the Shield was the one bastion away from ads on Android TV, then with one update that somehow manages to reinstall itself despite being completely disconnected from the internet, there are now permanently ads on my Nvidia Shield TV.
I honestly don't know why it's such a big deal for me, but I basically never use it anymore. It's real shame, I got a lot of good use out of it, because as you mention the support has been going on for years now. But I will not subject myself to ads if I can help it. I pay for Youtube to avoid ads, I pay for Twitch to avoid ads. I can't pay to remove ads from my Android TV homescreen (that I didn't even have for the past like 5 years)