The mobile Web isn't dying, it’s being killed, slowly, by Apple.
medium.com
medium.com
This isn't a surprise, just as the fact that "Chrome on iOS is just a wrapper around Safari's Webkit" isn't a surprise.
If you want to use another browser engine, then use a different OS. You won't have this problem on Android.
Apple's iPhone isn't the "The mobile web", it's just a lousy window into "the mobile web" for a fraction of the users.
When developing any responsive (or gasp mobile) site, I wouldn't check it solely on iPhone/iPad, that's crazy talk.