Talking out of your ass mate.
the 70's and 80's where home of the big studios and big budgets. Stadium rock bands sometimes spent a year in the studio till everything was perfect. The didn't half ass everything with DAW short cuts back then. Trust me if you have ever cut tape or bounce tracks across 4 different tape machines you would make sure it was right the first time.
When it goes to tape you have to commit to early on. They would spend a weeks perfecting listing through the monitors before they hit record. Today you set up mic's in one day, track in 3 days, mix down and punch ins 2 days and then its off to mastering.Its too easy now and everyone wants to commit later with plug in's.
I think the magic mic your looking for is the unidyne iii.