> With breakpoints, you have to keep track in your head, not only of where you are, but of where you expect to be. They can be useful too, but I probably use pr

> With breakpoints, you have to keep track in your head, not only of where you are, but of where you expect to be. They can be useful too, but I probably use print statements about ten times as often. Thanks for putting this so clearly. That is the headache with breakpoints in complicated systems with lots of layers of indirection.