I especially use rr as an exploration tool. It allows me to ask not the question "Where does the program go from here", but rather "Where did it come from". I

I especially use rr as an exploration tool. It allows me to ask not the question "Where does the program go from here", but rather "Where did it come from". I couldn't do my daily work without rr, since often I work with systems that are large and complex and I didn't write myself.