> In fact, how people can debug large existing codebases without a debugger is beyond me. Tracing and telemetry. Debuggers are very useful, but only when they'

> In fact, how people can debug large existing codebases without a debugger is beyond me. Tracing and telemetry. Debuggers are very useful, but only when they're needed. In fact, in large distributed systems 'debugging' end-to-end bugs is usually hindered with a debugger. As an aside, even when I have to use a debugger during runtime, the largest part of my interaction with it is heavily scripted, and the debugging process is not interactive.