And they are using IE6 because it works just fine everywhere. If suddenly the corporate IE6 suddenly started throwing up errors that its out of date, the IT guy

And they are using IE6 because it works just fine everywhere. If suddenly the corporate IE6 suddenly started throwing up errors that its out of date, the IT guy would soon find himself in front of the CEO being asked why the company is using outdated technology. Why should the programmers be the ones wasting valuable time, coding up for IE6, just because some corporate IT guy is too lazy to run an install file.