My comment about the black knit tie has nothing to do with whether or not I like them or how versatile they are. It had to do with the poster's comment about "owning a black tie in case I need it." While black knit ties can be very nice, I can't think of a situation where you NEED to wear one. If someone WANTS to wear a black tie, then I think knit vs. grenadine is a matter of how casual/formally you dress.
Of course. I just dislike the idea of owning a tie only for "just in case" scenarios, hence the attempt to change the conversation.