Your comment is wrong in so many ways. React, Cassandra, OoenCompute, PyTorch, GraphQL: where did these come from? Facebook.
Facebook has had to pull off their own feats of engineering. It is a fact whether you like their product or not.
I work for FB. I am leaving for my own personal reasons. It is not a perfect company. Your comment, however, is wrong and I am calling it out as such.