Joel Spolsky:

“We’ll get a programming language that’s portable and efficient. It will produce code for every web browser, and it will obsess about performance so programmers don’t have to. And they’ll never have to think about web browser incompatibilities ever again.”

I love Joel’s writing about project management, but I can’t recall a single worthwhile article he’s written regarding the actual languages. I think the last one he wrote was about some custom language they wrote. This article gets a lot wrong, mostly because of how out of touch this makes Joel look. For example, many of the current popular frameworks do have a single, cachable, location that can be shared among all pages that use it.