[nradov]

Until a few years later when you have to move the source code to a new repository or totally different source code control system and lose all the commit messages. In theory there should be a way to migrate the entire tree and keep the commit history but in practice from what I've seen that seldom happens.

[isbvhodnvemrwvn]

Or refactor something and git no longer thinks the new files are related to the old one since there is too little overlap.