Apple has great competition in Android, however it would be silly to open source iOS. GitLab/Android are customizable and have a ton of features, while GitHub/i

Apple has great competition in Android, however it would be silly to open source iOS. GitLab/Android are customizable and have a ton of features, while GitHub/iOS are more cohesive. Differentiation is how competition exists. Even if you prefer Android/GitLab, you can't deny that most of the early innovation was copied from iOS/GitHub. In fact, most open source projects (Linux, Firefox, OpenOffice, etc) take their lead from closed source competition... and for all those examples, that competition was Microsoft. That's not to say they can't eventually innovate, however much of the R&D, creation of a marketing, etc come from closed source. The downside of Open Sourcing so is losing billions of dollars from companies who say "rather than paying $10k/mo, I'm going to just fork it for free". Lastly, part of the value of GitHub is the network effects. If everyone's hosting it on their own, then there's no network effect.