"Businesses desire the bleeding edge in their online-facing products" What kind of businesses? In multiple enterprises I've worked with/for, they move at a sna

"Businesses desire the bleeding edge in their online-facing products" What kind of businesses? In multiple enterprises I've worked with/for, they move at a snail's pace and are resistant to change. I feel like most larger enterprises are at this snail's pace, whether it's b/c of outdated security practices they can't let go of, control issues, IT incompetence, or complacency in the way things are. The businesses which might be more forward thinking are agencies and some small businesses but I think these are less common. Why do you think it took years to let go of IE6, then IE7, and now IE8 and IE9 in the enterprise world?