I just noticed recently that 80's songs in particular faded like there was no tomorrow. Even great rock songs simply drifted into silence... weird.
I think fades are popular because it's easy to come up with a good intro, tie-in riff, main chorus line but hard to end on a note so to speak. So they take the easy way out -- hey mixer board, turn down the master gain... it'll sound cool!!
How lame. Death to fades I say!!
Most Tool songs are very heavy at the end... me likes...