My usecase is writing world class software.
Closed source limits the developer pool to those a company can hire/contract.
Open source widens it to *any* developer you can attract to your project regardless of where they work or are.
I recently blogged about how #DisciplinedAgile and #Essence are partnering. Our first venture was to essentialize DB refactoring. https://t.co/3MaEdA5y7t More to come!
Tried to create a SysML model w/ commercial tool to import in our Security Analysis tool. Got desperate and tried @PapyrusUML . Much nicer usability and correct meta-model!