Not quite as old as you Farkersfolly, but observed something similar. The mile posts in my experience were mandatory condoms after the early 80s AIDS scare (which seems to be finally dissipating - it’s becoming more common to be asked for a tip with full natural); decriminalisation of sex work; and then, around the same time, the influx of Asian workers. Wilson surfed the tide.
Good post. And I agree with you that it’s pointless booking now. Best just to walk in.