Forum OpenACS Development: 10 "Must Read" articles on AJAX, Accessibility and Web 2 technology
I think the article demonstrates that, like all technologies, there are always two sides to a single coin. A pro and a con, a good and a bad.
I've always believed that AJAX flourished because browsers supported it.
We may be at the verge of evolution. Who knows, maybe in a few years there won't be a need to use a back button or the browser's history function will start to track ajax calls.
In the end, I think it will boil down to
- the target market of your web application
- the purpose of your web application.
A more concrete example is the blog comment system Solution Grove worked on for PPS.org http://www.pps.org/news/.