Webdevs usually forget that neither practically unlimited bandwidth nor quotas should be take for granted. A lot of people have slow internet connections, don't make 'em suffer.

I actually think there are cases for this. Say, you have a small amount of CSS and/or the user will in all probability just look at the one page on the site.

There absolutely are, and I've done it myself. But it's a rare site that would really benefit from the method.

Yeah but the first load is faster!