[lenish]

> So much layout and presentation is done with JavaScript anyway that it would make just as much sense to get rid of CSS and extend and standardise on something like jQuery-but-better to create an evolving cacheable layout library that bypasses browser quirks and uses exactly one common versioned codebase.

The concept of executing untrusted code is entirely antithetical to security. Javascript, or any Turing complete language, or perhaps that even is too precise a constraint, is a remarkably bad idea for setting the style of anything that is otherwise static. There's no good reason that text and images need be stylized via a proper language rather than static, non-executable statements.

> As a user, I keep finding sites that simply don't work in Chrome or Safari or IE or whatever.

I keep finding sites that simply don't work at all in Firefox with NoScript. Many of those sites are primarily just text and images which don't display otherwise. It's completely insane from a security point of view.