Comment by dmicher

There are different paths companies take. Some buy and it really works for them and their business, since overhead is small and everything just works. The other set of companies have more sophisticated requirements: when they want to have full control on what is going on, understand what the code is doing to better optimize everything else around it, faster shipping cycles and being able to implement what you want with out waiting for the next shipping cycle with commercial software, community and knowledge base around it etc.