Perhaps this is due to the secretive nature of Apple, and as a result I'm always surprised when new Safari features come out. By the time a feature lands in a different browser, we already know it's coming.
(and it wouldn't hinder them from being gold silent on other matters; hardware, business, etc)
I've been tracking many of these issues on the WebKit bug tracker: https://bug.webkit.org
For example: https://bug.webkit.org/show_bug.cgi?id=80559 (Bug 80559 - [ES6] Add support for ES6 Harmony).
The release notes linked to also links to the public commit that implemented each noted fix/update/new feature.
It's just that they don't engage much and it doesn't feel prioritized.
Take this website for example: http://opensource.apple.com/
The design feels like it's from the early 2000. There is almost no documentation besides the raw data/files.
> Per https://www.chromestatus.com/metrics/feature/timeline/popula..., this syntax is still seen on the web, and any such pages would be broken by this change.
Do you mean "not relevant to the title the submitter chose"? The "article" is the release notes for the entire browser.
How come I did not know about this browser until now? Yet another one that will be abandoned and full of security holes in a year.
It's definitely not ready for primetime/production use yet.
Navigator.getUserMedia() is deprecated, so support for that won't be coming ever.