And in Safari 5, June 2010. Many features around workers, shared resources between them, high resolution timers and much more have been introduced… then removed… then reintroduced by all of the major browsers. As with push notifications, I’m glad the WebKit team has been cautious about adding or reintroducing functionality that could be abused.
There are surely pet bugs I wish they’d fix sooner, but they’re hardly the stagnation you portray, especially in the last couple years. There are features devs care about where WK and even Safari have been first to ship.
I’m sympathetic to the argument that iOS shouldn’t prevent other browser engines, albeit cautiously so. But this kind of disingenuous haranguing isn’t helping anyone understand the situation or helping them have a better experience on their own devices.