Apple will be adding support for AV1. Like VP9, AV1 is royalty-free. The Alliance for Open Media has been so effective (even before AV1's release) and HEVC's licensing has been so terrible that MPEG is starting to question whether it can survive as an organization:
http://blog.chiariglione.org/a-crisis-the-causes-and-a-solut...
Royalty-free video formats are simply a better way to go.
WebM was released in 2010. VP9 is from ‘12/‘13.
H264 was already the web video standard when WebM/VP9 came along.
I take issue with Google trying to force everyone over to their format and removing support for higher resolution H264. They crippled what used to work for me to push their agenda. And because it’s license free I’m supposed to be good with it.
This is exactly the kind of stuff people used to get pissed at MS or Apple for.
But it’s Google, and people love Chrome. So this is good and Apple is the one not going with the ‘standard’ that ‘everyone else’ is using.
And, yes, it was not Google's finest hour, especially when they strung Mozilla promising to disable H.264 in Chrome but never actually shipping it (remember https://brendaneich.com/2012/03/video-mobile-and-the-open-we...).
This isn’t like Mozilla, who only makes a web browser.