Earlier quoted context omitted.
I don't think it is fair to discount battery life, memory usage, and performance so heavily. Looking at the http://caniuse.com list there are plenty of features supported by Safari and not supported by Chrome including Audio Tracks, Video Tracks, ES6 modules, SVG Fonts, Animated PNG, CSS regions. Safari is actually the first to 100% ES6 compliance; Chrome sits at 89%. I would also remind everyone that Google chose to…
That's only the newest version of Safari, before that it was pretty shit (on par with IE). Can't expect the mind share to change overnight, especially when it has lagged for years.
Some features in particular service workers Apple has deliberately chosen to take a firm position on because they value battery life and security.