I'd also venture to say that there were just simply less pro-level discs to work with, so many pros just used one disc and cycled (i.e. discs that weren't workably overstable and torque resistant enough). Even Doss back in the day threw that crazy beat up blue TI Buzzz as a turnover disc rather than going for the Comet, Meteor, or Buzzz SS.
FWIW, I'm not trying to say that cycling is better. I've just recently experienced it and am really enjoying it, and wanted to offer reasons why one may want to cycle vs. not. I'm here for the banter, not any dogmatism