Plenty of people were saying it, go look at the threads. And who besides Serra had they produced that was good before Weidman. Go ahead, I'll wait.
They've had multiple fighters in the UFC. And just Serra is better than anyone SBG has ever produced, lol.
Vilante, Sell, Cummo, Costas, Gordon, Iaquinta, etc.
That's much more than SBG can say. Also Weidman trains in the NY area where guys constantly jump between gyms, Renzo's academy has a who's-who of guys that can include Edgar and GSP and Weidman trains there all the time.
I don't know how you can argue Serra-Longo isn't better than SBG, they had guys in the UFC before SBG even existed I'm pretty sure lol.
Conor is obviously a good fighter, he'll be successful at SBG, but if you don't think he could improve his game by getting better higher-level training partners you're kidding yourself.
part of the reason Stann retired is he wanted to stay close to his family but the Atlanta gym close to him wasn't high enough level for him to keep competing in his mind, and they had more UFC-level talent than SBG - it was Roan Carnerio's gym I forget the name.