Pancho being right about what exactly? Also, why is the example of there not being constant progression in the NBA a "stupid analogy"? Jordan throws a big wrench in the constant progression theory. In addition, they play basketball "games" not "matches" in the NBA. Besides Jordan, look at centers like Ewing and Robinson. Are the centers of today better than them? Why not?
Laver was 5' 8''. Not to take away anything from him, but can you imagine playing serve and volley at Wimbledon today with the current technology and rackets?
Yes Laver is an all time great, but his physique wouldn't allow him to be dominant in the current field.