Ilford is currently stable. It would be bad for them to take the risk of diversifying into color film. It is likely that the money expended would have little return thus leading to their collapse. I would far rather have a stable manufacturer of color film than one teetering on the edge trying to produce color film. I really like Ilford black and white films and would hate to see them go away because of a stupid decision. It is best that they stick to their niche.