> In the DAG-based systems, branching is done at the level of a repository. You cannot branch and merge subdirectories of a repository independently: you cannot

> In the DAG-based systems, branching is done at the level of a repository. You cannot branch and merge subdirectories of a repository independently: you cannot create a commit that only partially merges two parent commits. Please inform me, how can you ever possibly create a commit that is a "partial merge" from two parent commits? At some point, you had to explicitly choose what you wanted to merge or not merge, and you can do exactly that in Git, and I would certainly assume that you could do that in Mercurial and Bazaar too. Or am I missing something?