https://web.archive.org/web/20230224155431/https://pthree.org/2009/12/31/the-meaning-of-su/ "su" can do so much more than Ken and Dennis implemented back then, as already discussed. Surely, the definition of "su" has changed, at least a little? I would hope so. The great thing with human language, is it is dynamic and flexible. We, as a society decide what meanings we put to our words, so as far as we are concerned, "su" could mean so much more than "super user". We can define it to mean "switch user", "substitute user" or "subshell". Or, we can be stubborn, and hold to the old definition from 1975 that "su" means "super user".
