The most ideal and default go-to for quick inspections of program flow and variables should always be quick access to a good debugger when possible (ie. one sin

The most ideal and default go-to for quick inspections of program flow and variables should always be quick access to a good debugger when possible (ie. one single keystroke). Everytime you have to do a printf it's a slowdown, and you can't out-argue the fact that you have to type up to 20ish keystrokes and excite a number of brain neuron cells trying to remember what that printf syntax or variable name was. In comparison to a debugger that automatically prints out your call stack and local variables even without you having to prompt them.