That probably explains the following excerpt from an MIT job ad, years back:
Applicants must also have extensive knowledge of UNIX, although
they should have sufficiently good programming taste to not
consider this an achievement.
Wayne "It takes a hungry man to eat a tough chicken" Baisley
P.S. And prior to Windows (not to mention Java or ActiveX), some used to say:
UNIX: the only computer virus with a user interface, such as it is.