If Apple really wanted to make Web Apps feel like a second class citizen, they wouldn't be adding Force Touch, custom AirPlay control support and Picture In Picture support to the upcoming version of Safari. Those are deep, native app level features that aren't even Web standards yet.
I assume Apple is underinvesting in safari simply because they have bigger fish to fry, and they are notoriously understaffed with competent engineers (or have bad project management).
They're adding APIs that only benefit people using their hardware. Unless they open source AirPlay and whatever else they need to do for Force Touch I'm failing to see why I should be excited by that.
I assume Apple is underinvesting in safari simply because they have bigger fish to fry, and they are notoriously understaffed with competent engineers (or have bad project management).