I got a 90 for my Toyo for a few reasons:
#1 COST, shorter lenses are much more expensive.
#2 As John mentioned, the shorter lens need an expensive center filter, making the lens even more expensive.
#3 Not all cameras can use the short lenses. I have to use a recessed lensboard on my Toyo for the 90. I don't know if I even could use a shorter lens.