There’s a large and welcomed dollop of truth in there, brother. The players like Tsitsipas and Zverev, who allowed the geriatrics to have their way with them, won’t have the backbone to hold off an Alcaraz or Felix if they develop as we think they might.
Look at all the generations of tennis players who’ve been hopeless, in the face of the Big 3: Roger's contemporaries like Roddick, Safin, Nalbandian, then the next bunch like Tsonga, Berdych, Gasquet, then the Missing Link generation of Grigor and Samurai and Cough Drop. Now the generation that followed them, Tsitsipas and Zverev, Medvedev etc, they’re already in danger of looking old.
I don’t know if I missed any generations in between. What might help Carlos, Sinner and Felix is that they barely knew the Big 3…