It is true that MS is doing great things in open source community. However, this move now opens the door for a second big development platform. Not every MS competitor will feel comfortable to contribute to Microsoft’s platform and there are still many hardcore open source advocates who believe that any company who sells closed sourced software can’t be trusted. Nevertheless, this is a brilliant move of Nadella, perhaps even better than the acquisition of LinkedIn. If you compare this do Ballmer’s acquisitions… Once more Microsoft is one step ahead of Google and Amazon.