Microsoft backs long life for IE6
news.bbc.co.uk
news.bbc.co.uk
However, businesses that "can't justify" upgrading their software are kidding themselves. It's not even a software problem...maybe no one educated them about the realities of hardware failure. When your PCs start dying, that's a heck of a time to figure out that you can't even buy something that will run your carefully-unmaintained business software.
If only making the argument was that easy; sadly, IE6 will survive as long as Microsoft still supports XP. I foresee IT departments blowing away Win7 installs left and right to install their prebuilt system images with XP / IE6. Unfortunately, support really is the deciding factor.
So it is also dependent on their very large customers.