Earlier quoted context omitted.
Three of the four are in fact outliers: Kubernetes and Android are both financially backed by Google. Is that really "outlier" behavior? More and more important open source projects are prominently backed by a single large tech company. React, TensorFlow, TypeScript, Go, etc. If you just look at the last decade, there has been more important work done as "single-sponsor open source" than under the GPL.
A few monopolistic corporations having dictatorial power over key technologies is a dystopian nightmare. Those projects have ultimately the interests of the corporations in mind not of the users. Ever wonder why overcomplicated technical solutions are hyped so much? Why does everyone and their dog need to run Kubernetes? Why is it all Maschine Learning instead of good old fashioned methods that would do much better?…
TensorFlow and Pytorch are similar. Yeah, people end up using machine learning a lot when they don't really have to. But researchers and developers can achieve a lot more when they don't have to reinvent the wheel, and machine learning has provided some really great things.