Comment by SilasX

>The reason for this is that it's hard to hire native UI developers, but easy to hire web devs.

This ... has been very opposite of my experience:

1) I've seen websites turn into poor imitations of mobile apps that lose all the features of web UIs that I want: ability to open links in tabs, use of affordances to scroll up and down, dense packing of information, ability to edit the size, etc. (Edit: almost forgot how they run the back button too!)

2) Generally, I see that the more UI specialists they have, the worse the UI gets. There's the saying, "developers are responsible for mediocre UIs, designers are responsible for horrible UIs".