Until we are stuck with Eclipse 3.4 under Domino Designer, using some Eclipse plugins is limited to older versions of them. But we have Nathan T. Freeman on our side (of the Force), so at least for Git plugin (EGit/JGit project) this is not true. Go grab new release of updated Git support to OpenNTF.org. Now!
Because versioning is part of standard development process. For all developers! Nobody is excused!