220 never had a plethora of emulsions to choose from. From the start 220 was limited in choices. That only got worse. When I had the Mamiya C330 there were no black & white films. I sold the Mamiya and got the Hasselblad; the choices were even fewer. I decided not to invest in 220 backs. That was a decision that history proved to be a good one. If the films were available when 220 first came about, I would have supported it. If the films were available in 2007, I would have supported it. I for one cannot shoot film that is not available in any format which I use. Since I could never get what I used, I could never support it. I am sure that I am not the only one.