This person lives in a fantasy land. Safari may be on a brief hot streak right now but they have a long and deep history of dragging feet and literally slowing down the entire ecosystem.
It's annoying that I need Apple hardware to make sure my web applications work in Safari when I basically never need to specifically test Chrome or Firefox.
YMMV. If you hate Google and love Apple - it sounds like a good idea to kill innovation at Google's expense.
There's nothing stopping the web from being frozen. Safari could do it if it wanted to. All that would happen is that Safari would lose market share.
(Media stack? Yes, I am salty about Opus Ogg support.)