Now, I know that this stuff has been discussed over and over again in different forums, so I am not going to waste so much time on it. Anyway, I'll give it a shot. URL usability is a pointless expression. The concept that an arbitrary URL should be bookmarkable is equally wrong.
Frames let developers build advanced and responsive web-based GUIs.
Please stop giving the world this crap. Also, I really find it strange that those opposing frames are also those opposing the introduction of support for 'innerHTML' and the like, which is the only thing that would let developers emulate frames in the unlikely event these are gone one day. All rights reserved.