Whippersnappers these days are so gosh darn polite.
Writing C code on a SPARCstation and Green Hills compiler/debugger as an undergrad in 1989, I got used to step-forward, and step-back, in a GUI environment.
I had no idea that I'd never see that magic "step-back" button again, in C, C++, MFC, Java, Scala, or a litany of scripting languages and development environments.
Other people have touched on it, but you could be proficient in literally all the programming languages back then. There were less than 20. The later explosion of languages and techniques in common use can be overwhelming, but has stretched the spectrum available to our craft.