sgcim,
It's interesting -- and surprising -- that they were such jazz traditionalists. No Coltrane after he left Miles?!?! Modal music is "boring"?!?! Yowza.
Speaking of Aja ... I was 9 years old when it came out 1977. I grew up on that album because my father LOVED it, played the hell out of it.
I still have his LP. I rarely play it, but when I do, it's like a time machine -- it takes me back to being a kid.
But, aside from Aja (and the radio hits that everyone knows), Steely Dan has never really grabbed me. I "imprinted" on just that one LP. It was the only Steely Dan record that my dad had, and I've never really dug any further.
Maybe I will one day...