Nailed it. More generally: "non-technical cultural factors".
I would also add some minor incidental technical factors (e.g. early Lisp implementations were far less efficient than C implementation during the time when efficiency really mattered, and then cultural/marketing factors kept C as the dominant language far after the technical balance tilted in favor of Lisp).
I would also add some minor incidental technical factors (e.g. early Lisp implementations were far less efficient than C implementation during the time when efficiency really mattered, and then cultural/marketing factors kept C as the dominant language far after the technical balance tilted in favor of Lisp).