25+ years of professional experience here. I very rarely have to debug (because of extensive test suites). But when I do, I always use printf. It gives me the f

25+ years of professional experience here. I very rarely have to debug (because of extensive test suites). But when I do, I always use printf. It gives me the full power of the programming language to selectively detect and print the key information I need to reason about the system. It works great. I know how to use debuggers. I just choose not to.