It also doesn't make that much sense to begin with. Part of the cost of using the longbow is the years of training and feeding the longbowman, and the cost of

It also doesn't make that much sense to begin with. Part of the cost of using the longbow is the years of training and feeding the longbowman, and the cost of that training could easily buy multiple crossbows. If it weren't much more effective than a crossbow on a per-soldier basis, they would not have seen much use.