Most single page web applications are as bad when it comes to SEO as Flash websites. "Download our mobile app" pages are the new skip intros of Flash days. A lo

Most single page web applications are as bad when it comes to SEO as Flash websites. "Download our mobile app" pages are the new skip intros of Flash days. A lot of Javascript apps are CPU hogs, HTML5 video decoding performance is as bad as Flash video on Mac and Linux. Security flaws are starting to show themselves while more native API is being opened. Should I count more?