Those abbreviation decisions were made in the early 1970's. How does that indicate the non-obviousness of deciding when it is or is not appropriate to use abbreviations today?
I was writing from the point of view of someone who finds Unix abbreviations perfectly acceptable (as compared to my comically abrogated SmallTalk / Objective-C (I don't even know which) invocation above (https://news.ycombinator.com/item?id=10990803), which I'd say is clearly not acceptable). Certainly, my argument will not be convincing to someone who doesn't share that point of view.
