Donald Fagen is/was well known for doing take after take after take when recording looking for what he found perfect. He would sample notes, replace notes, replace drums and cut and paste until he made the mix he wanted. I was in the music software/hardware industry at the time and the Wendel and Wendel Jr. computers/samplers/drum replacers along with Garfield Doctor Click rhythm controllers were heavily used. I am sure he also did a ton of old school punch in/out and used other mechanisms to get things just the way he wanted.

The point I am trying to make is that the processes that used to take a maniacal amount of time, resources and attention to detail can now be done quickly and automatically. Does Steely Dan's Aja sound better or worse than a modern album produced using modern techniques?

This comes down to taste and who am I to determine what someone else finds appealing in their music? Producers have been "producing" songs and moving them from their originally recorded state into something entirely different for decades.

I personally miss singers being slightly out of tune and beats being slight out of time in songs. I love hearing imperfections in older music. But, would Trevor Horn have pulled some of the singers he produced back into tune before pressing the vinyl? Someone should ask him. I am inclined to say yes.