You do realise the current codec is from 2003 right? The tech has made leaps and bounds since and the newer versions just cost a shitload more
I really don't know where you are getting your information.
Google are the ones that has championed advanced codecs like hevc(h265) and VP9.... back in 2003 we were using flash.
Google recently moved everything over to VP9 as recently as 2017. And they started working on the VP9 codec in 2013. And Hevc is even supposed to be better than tha, and is probably what Stadia is using.