I see that to other responses have taken the sarcastic route, and I was strongly tempted to join them. Instead, I'm going to control myself and respond to this as if it was serious.
The simple fact is that there is a high demand for interactive applications. One of the best ways to distribute these applications is the web using JavaScript. If, for some reason, this distribution channel were removed (let's say it was removed by law) the demand would still be there, and the 'older' channel still remains - native apps. If the average person uses, say, 20 webapps heavily and a few hundred glancingly, and let's say that 10% of these survive the transition (probably a high figure) that's still a good handful of new native apps, each of them with their own security issues.
It was serious apart from the fact that I know it would never happen and will see little support here due to this website's infatuation with JS.
Every website that I see using JS these days would work much better with some GET or POST requests. Some examples:
* Using JS to load the next page for instance. That should be a simple request to the server for a /page2/.
* Using JS to change sort orders. Again a simple request for a new page should be made to the server.
* Pages not loading a full list in one go but making several requests for more entries via JS. The server should just return one long page.
* Searches not being sent to the server but using the browser to search which does a new search for every character.
* The same searches above hijacking the back button so that I can go back one key from round -> roun -> rou -> ro ->r -> no search -> at last, back one page!
* Images being hidden behind a javascript link when it should be a simple hyperlink to the image.
As for every website writing their own native software, at least some that I can think of could be substituted for old ones. Think ftp (or better yet sftp) for uploading files.
