Comparing the bodybuilders of the 70s to the bodybuilders of the late 90s and 2000+ is just...well...not realistic with the addition of so many chemicals.
1) Insulin
2)
HGH
3) IGF-1
4)
Clen
5) T3
Just to name a few.
Another point, why do people adore short BB'rs 5'6 or shorter is beyond me.