Because it's nicer tool to use. To borrow someone else's descriptions (paraphrased), it's simultaneously simpler than git and more powerful than git. Some thing

Because it's nicer tool to use. To borrow someone else's descriptions (paraphrased), it's simultaneously simpler than git and more powerful than git. Some things that were a source of friction in git (e.g. any non trivial rebase) just stop being so.