I always thought it was something inferior at my end of the food chain
I thought that too, but it's endemic to a lot of popular albums unless the artist wrests a lot of control away from the record companies.
Part of it seems to be that Fagen has gotten more interested, lately, in how things work, sonically. This is a very human but probably correct part of the explanation as to why recent albums sound so good. Just a hunch.
"Although Steely Dan wore their love of studio technology on their sleeves, it seems that this was driven more by Walter Becker and engineer Roger Nichols than by Fagen. "Roger and Walter were always more interested in technology and in what the latest thing was," explains Fagen. "Walter's father was a hi-fi nut in the late '50s and '60s, and Walter is a science prodigy who went to Stuyvesant High School in New York, a specialist school for kids who are really good at science. I also got into high fidelity and I like good sounds, but I was never as much into the technical side of things."
Elliott Scheiner, who also worked on The Nightfly but not on Kamakiriad, agrees, but finds that things have changed. "Donald has become much more savvy as far as what takes place in the studio is concerned," he says. "He now knows what the technical issues are and what can and can't be done, whereas a dozen years ago Donald didn't know or didn't care, he just wanted to get things done. For this new album it was a great process to be working just with him, and he definitely made a lot of comments, but he is not specific about certain things. As far as EQ is concerned, he'll say 'I want a bit more top end there, or low end on the voice,' general comments like that."
https://www.soundonsound.com/people/donald-fagen