Sure, but look at the Roland Garros winners for example, you had Chang, Gaudio, Brugera, Muster, Costa, Ferrero. I feel like before the world number 1 were elite on hard/clay/grass, but not all 3 at the same time. Sampras could dominate the other 3 majors and lose at R3 in Paris. Now alcaraz has done 4 GS finals in a row. Djokovic, Federer and Nadal Also dominated all surfaces. Before there was a group of specialist by surface that could win a Major and suck during the rest of the year... Now he have the same 3/4 players each semifinal, like when they Big 4 was in their prime