How often is there a new feature and not just a bugfix in git? Honest question as I don't use git. And does git really use up that much space to be an issue? I

How often is there a new feature and not just a bugfix in git? Honest question as I don't use git. And does git really use up that much space to be an issue? I imagine the problem is just conflicting binaries/libraries which can be fixed pretty easily in .bashrc...