The spy satellite or fighter jet software doesn't have to be on Github, but it also doesn't have to be locked up in the vaults @ Boeing or Northrup Grumman, and

The spy satellite or fighter jet software doesn't have to be on Github, but it also doesn't have to be locked up in the vaults @ Boeing or Northrup Grumman, and only accessed or improved at a huge fee by a rent-seeking corporation, who will discharge developers who are experts, and for another obnoxious fee only offer to retrain them, if they happen to still have access to the source code that might have been lost in that fire years ago.