Not much they can do about it. The changes on Google’s end puts a demand on the Bravia hardware it just can’t handle. So they couldn’t support it they wanted to.
Wilburt is right tho. It’s like oh no I have lost YouTube and all I can do is either plugin a chromecast, nowtv, ps4, ps3, Xbox 360, Xbox One, Apple TV, android box, roku, Sky+ box, Virgin TiVo, FireTv, fire stick etc, raspberry pi etc