It's all in isolation unless the trunk takes pull requests. Forking doesn't change that either. There's still got to be someone evaluating changes in light of their impact on 20 million lines of code.
Re:CoreCLR is now open source
by YorkianTones on Wednesday February 04, 2015 @02:44AM
(#8995757)
^This. This is the hard part. Interdependencies and compat.
The beauty of open source model is it gives the desperately motivated the means to fix their problems in a way that benefits everyone.