I use this a lot when trying different ways of solving things or debugging. Just today I was looking into a bug when I started worrying that it might be caused

I use this a lot when trying different ways of solving things or debugging. Just today I was looking into a bug when I started worrying that it might be caused by a fairly recent improvement I made to the feature. I went to the file in question, went back two weeks with ":earlier 14d" then recompiled and confirmed the bug was already present without my change.