You know, the funny thing is....
Mentzer looked great in 77, 78, 79.... he had an awesome, powerful physique. In fact Arnold's Education of a Bodybuilder was the reason I started lifting at 13 / 14 years old until my mid 20's but then I quit for s long time until my late 40's when I came across a thread of Mike mentzer pictures and saw his most muscular shot on muscle rock, I was so motivated I began lifting again and haven't stopped since
I started again by using his training methods (since it was his phpho that inspired me) but I quickly found that he didn't build his physique with those methods and those methods don't work! I switched to a more conventional volume workout, which not inly worked but was more fun.
The worst thing about mentzer is his annoying fans who loved repeating everything he says, while not making any progress!