Exactly. Have fun debugging a microservice in production. All you can do is increase the log level, and even that is sometimes not possible because the program would spew out so many logs that it would bring down either some disk or the network.

In these cases, the Feynman method is sometimes all that you can apply. I have already spent plenty of hours with a stacktrace on one screen and the source code on the other screen, stepping through the source code in my mind (usually backwards from the end of the stacktrace).