I program on a mid range system. If I want to write in C for it I could but I have no reason too. I use two languages that appeared well before C and produce very effective and near bullet proof code because of it.
There are some big names in the language world that were here before C and some probably had influence on that language.
While I would not mind refreshing my C, having not had any use for it since 85, I am not even sure where to start.
Out of curiosity, what do you use? My history is not too great, but I can't think of many languages that came before C that are still in use today. I actually use fortran at work (along with C), and I'll give a pass to Lisp (it seems like c predates the dialects that are still in common use, ie common lisp and scheme), but it seems like most others (Pascal, COBOL, Basic) are more curiosities in the modern world. Please correct me if I'm wrong.
Pretty much every programming language in existence has bindings to C.