Because to recommend that people leave IE6 is to work together with Microsoft (a company which has no more desire to keep supporting IE6 than anyone else) rathe

Because to recommend that people leave IE6 is to work together with Microsoft (a company which has no more desire to keep supporting IE6 than anyone else) rather than making a large and powerful enemy. Because anyone who is still using IE6 is statistically likely to have reasons (real or imagined) for sticking with browsers in the IE family. Why fight that, when the payoff for merely getting them out of IE6 is so great? And because any program to get people to switch browsers subtly encourages people to try something other than IE. 100% of the world's IE6 users are IE users, but less than 100% of world's former IE6 users are IE users.