As I was working with Decorators in Python, a tutorial presentation mentioned that "This is Python's way of doing Aspect Oriented Programming, which was a really big deal like 10 years ago."
Seeing references to it elsewhere, I don't think that it has actually become less prominent in the Java world, but rather most questions about it are being asked and answered in other forums here, pertaining more directly to specific implementations, right?
Possibly, although I have no personal knowledge of any such forums. My impression is that AOP is indeed much less popular than it used to be, meaning it was overhyped, and time passed it by. Not sure about Spring AOP, but Aspect/J had its last big release 3 years ago (and their .0 releases didn't seem like a big deal for years before that). Just my $0.02.