This is ultimately why WebKit was forked again into Blink. Because Apple is such a poor steward of open source and WebKit is absolutely riddled with bugs and

This is ultimately why WebKit was forked again into Blink. Because Apple is such a poor steward of open source and WebKit is absolutely riddled with bugs and incomplete implementations of web tech that are pretty much table stakes at this point (WebRTC, among other things). At this point I think most people agree that Safari is the worst mainstream browser in existence. This is why Apple is met with groans instead of praise when their open source contributions come up.