There are times when having an English word for "no, well– yes, but I don't know why you'd want to" would be very useful. It'd have to be pretty short to save breath every time a computer scientist must answer the question, "But is it a systems programming language?"
mu is more like "you've made a category error" or "the question makes no sense" rather than "technically yes, but you wouldn't want to" - which is what the post you were responding to seemed to be aiming for
