Re (1), doing full-page rendering on the server is not up to the current state of mobile apps. You can already partially update a page. Zero latency is on par a

Re (1), doing full-page rendering on the server is not up to the current state of mobile apps. You can already partially update a page. Zero latency is on par as well on the mobile web, as a web app can load its code on the first render, store some data for offline (though this is a lot more work than it is on native because of the bad state of web databases implementations) and request data to the server when it doesn't fit on a phone's memory (surely, the native Quora app doesn't store its terabytes of data on every phone) (2) is bit hand-wavy in my opinion (3) is spot on, bookmarking to homescreen is something people don't know about; typing a password is okay if it's only once I think (4) is about prioritizing resources to the most popular platform: a website on desktop, a native app on mobile