https://phys.org/news/2018-06-microsoft-embraces-collaboration-75b-github.html

As Microsoft built its business on proprietary software such as the Windows operating system, it came to be seen as an antagonist to the open-source philosophy of free software written by a collaborative community of developers. The company has been working for years to shed that reputation, especially after Nadella took over in 2014.

"Developers will be at the center of solving the world's most pressing challenges," Nadella said in a blog post Monday. "However, the real power comes when every developer can create together, collaborate, share code and build on each other's work."