There is a small, but dedicated group of people who have become loyal customers precisely because you offer extra-wide sizes that fit. For example, the Pegasus 30 in extra wide, the Revolution 7 in extra wide, etc. I have purchased so many shoes because of this fact alone. Not consistently offering the size, or having, as many companies do, an "extra wide" that is not truly wide enough will turn some of us away who buy nike products because you offer shoes that fit.
Another thing -- the "Write a Review" survey asks what size you wear, and collects that data, but DOES NOT ask you what width preference, meaning you're not even collecting data on that.
I hate to have to be a vocal complainant, but I'm just trying to let the product designers know that availability of that size is one of the reasons people get on this website to buy shoes.