Zuckerberg created a culture of copying rather than innovating, driving out all of the talented employees. The long-term consequences of that leave you with a banal organization incapable of shifting with the market.
Interesting then that the community has massively adopted React and PyTorch as defacto defaults for web dev and deep learning. How is it that these untalented lifer's left behind are doing these wildly crazy good technical things?
I suspect Reacts adoption is more along the lines of "nobody ever gets fired for buying IBM" than because it was genuinely novel. The space of JS frameworks was very well explored by the time React was created.
PyTorch is based on Caffe which was created by Yangqing Jia at UC Berkeley.
You can argue (and I'd agree) Facebook has talent for cherry-picking the best parts of innovative projects. But cherry-picking in and of itself doesn't constitute innovation.
