>The most popular operating system hides it from the user, so clarity would not improve in that case. If you mean Windows, that's not entirely correct. It defa

>The most popular operating system hides it from the user, so clarity would not improve in that case. If you mean Windows, that's not entirely correct. It defaults to hiding only "known" file extensions, like txt, jpg and such. (Which IMO is even worse than hiding all of them; that would at least be consistent.) EDIT: Actually, I just checked and apparently an extension, even an exotic one, becomes "known" when it's associated with a program, so your point still stands.