The graphic work is good, but the hierarchies are inconsistent and need more work. This map is vast but it has a lot of important gaps. Some other things are

The graphic work is good, but the hierarchies are inconsistent and need more work. This map is vast but it has a lot of important gaps. Some other things are just inaccurate. e.g: github required for any path. You could use gitlab, bitbucket, gerrit... plenty of good solutions out there.