I worked in the industry before flash, during flash, after flash, and in my little corner of the world, the iphone not supporting flash was the biggest factor in the decline of flash. Every executive and bigwig could not drop their blackberries fast enough, and grab the newest status symbol iphone. Once management all had iphones, then flash just would not do, and the directive came down to make the website "good" for iphones, which usually entailed adding excessive white space, large lettering, and big buttons.