I've used print debugging extensively doing embedded development, when I could reasonably hook up a serial port to capture the output, or put a crude console on

I've used print debugging extensively doing embedded development, when I could reasonably hook up a serial port to capture the output, or put a crude console on a tiny screen. These systems can't always be debugged in the traditional sense, and if you're troubleshooting some bug that happens on hardware but not in your simulator, then you use the tools you have available.