They seem okay so far with it. I have an older B7 and it still gets updated from time to time. My TV didn't ship with Dolby Vision, but the recent firmware upgrade gave it Dolby Vision.This is good to hear. Do LG keep the original functionality maintained, things like YouTube apps and so on? They are usually the first to stop working when the host service changes protocols.
Not sure how or what they did to accomplish that, but it's supported now.