Because it is optimized for small size dye inkjet printer like the pro-100. Luster goes well with pigment so it makes sens if they offer it in roll.
http://www.usa.canon.com/app/pdf/printer/PT101_Guide.pdf
PT-101 is amazing but does not go bigger than A3+ size. I tried it with dye, it is gorgeous. I would be curious to see with pigment how it goes, if u say it is killer with pigment, it must be Terminator with dye :gig
"Question:- Why would you want to use dye inks in the 11880 ?"
Because it is the best visual result I can achieve
I make some kind of HD Posters. If my number one priority is "Visual strenght" over "Longevity", it is the best choice I can do.