We've seen this happen on other smart TVs. However the small boxes like Roku and new BD players can add this back in for not much. Not that makes it right.
So, 2 years ago when we built a new house, we bought 3 new "smart" Panasonic TV's ( two 42" models and 1 65" model) and had the house wired with cat 5 cable to take advantage of all the features, especially YouTube. As of yesterday, YouTube is no longer available because of a marketing decision by them. Panasonic's reply and/or response - NOTHING!!
Why bother buying a smart TV if the features you bought it for can be made defunct by a third party? I don't believe most people buy new TV's more frequently than every 6 or 7 years or longer. If nothing can be done from a technological viewpoint, then TV manufacturers would be better to go back to "dumb" TV's at a lower price rather than add features (which increase the price)that will be defunct anytime some 3rd part decides they want to change their software in order to increase ad revenues.