the website mechanism has so many flaws, an abitrary code size restriction for once, constant access to the internet for another. And you can't really tell if the code you run today is the same as that yesterday.
They do, because the browser will arbitrarily unload your webapp for no reason whatsoever, so you'd better have the Internet available any time you want to switch back to the app...
You seen a 100MB web apps? That's pretty common in mobile apps. A practical restriction rather than a principle one. A web app can be as large as it wants, it will just take forever to load or some obscene over-engineering to stream the modules.
