I haven't used a debugger in 20+ years. If I don't understand what is happening to data without stepping, the code is too complicated. If it's too complicated

I haven't used a debugger in 20+ years. If I don't understand what is happening to data without stepping, the code is too complicated. If it's too complicated, I don't understand it now, won't understand it later, and it's probably wrong. If I was working (again) in embedded systems, I might use a debugger as a substitute for print.