Kiss's "Dressed To Kill" even had extra silence in between songs to make it to 30 minutes, it was so short. Then again, it was the third album by them in 18 months, and they were touring like maniacs, so it was a different environment, but still.
I'm on the fence. Some of those '80's metal records - 42 minutes of pure annihilation - are damn near perfect, when compared to, say, Genesis "We Can't Dance", that should have been pared back. But then again, what do you cut from, say, "Scenes From a Memory"? The answer is, nothing. So there's no perfect answer.