Am I the only one that looks at this whole app-crazy-run as something completely unsustainable? Why would it be unsustainable? Most apps that rely on REST APIs

Am I the only one that looks at this whole app-crazy-run as something completely unsustainable? Why would it be unsustainable? Most apps that rely on REST APIs are fairly easy to write. And a few years ago, the experience was much better than web apps. I do agree with the article that it is a user hostile experience, from the popups, to the inconsistent experience across platforms, and bad support for new platforms.