You obviously haven't been working with companies in the financial sector. Those Fortran developers you always hear about, this is were they are working. Many companies in that sector use rather old systems that can't be replaced. Some of those systems rely on IE6 or IE7.

I do work for a company that targets that sector and we calculate with a user base of about 50% that still use one of those browsers. Yet, we want them to have all the bells and whistles that the web offers today as well. This will change (and is changing) but rather slowly. Some might even say it barely even moves.