Including vendor prefixes in a release build, I said, is arguably wrong. I'm not arguing that it is - I honestly don't know which is better, as not including th

Including vendor prefixes in a release build, I said, is arguably wrong. I'm not arguing that it is - I honestly don't know which is better, as not including them has downsides too. And, as you said, other browsers do this too (but less recently), it isn't a WebKit-specific thing. The only difference is that WebKit won on mobile and has become the dominant web rendering engine there, between Android and iOS (and Blackberry, WebOS, etc. etc., pretty much everyone uses WebKit on mobile). The only solution to this would be to not have a single implementation dominate the market. But that has already happened on mobile, the question is now how to live with that. (And there is risk on desktop too.)