Imagine Rafael Nadal coming along and winning 5 straight Wimbledon titles BY SERVING AND VOLLEYING.
Hell, imagine Fed winning one Wimbledon S&V(he hardly ever S&Ves)
To be fair, S&V was a lot more common/easier with wood racquets since it was so hard to hit returns with that equipment, esp on faster surfaces. You got a lot of unreturned serves, easy put aways back then. Plus the grass has been changed as well.
Almost everybody S&V quite a bit on grass in the 70s, even Connors.