>Committing to a web app (for a user), and monetizing it (for the software author), is much harder -- especially on mobile.

Partially agree. Monetizing it is surely a big concern. But creating a web app is far easier than native. Big concern for me is the updates in OS which forces us doing changes and unnecessary wastage of time. Docs are also not proper. But unless you use frameworks like angular, web hardly needs those changes. Now a days I am able to do proper native kind of animations with help of CSS3.