Exactly. Sometimes is necessary to step into the call of another function/actor, see what is is doing, note is necessary to step into more into a deeper functio

Exactly. Sometimes is necessary to step into the call of another function/actor, see what is is doing, note is necessary to step into more into a deeper function, etc. Or stop when a certain value arrive, and inspect the code. If this could be done with actor/csp, then is good idea to jump onto it.