Depending on where you're from you might have used another orthodox file manager. For some reason they've been very popular in central and eastern European countries.

For example i've worked three Polish gamedev companies and in every single one of them most people (including people who weren't even born in the days of Norton Commander) used Total Commander (it is GUI-based but the shortcut keys and overall layout are almost the same).

(FWIW Notepad++ was ubiquitous too)