IE6 Was Unsafe 284 Days In 2006

Slashdot yesterday on a Washington Post's Security Fix blog, where Brian Krebs has toted up the total vulnerability days for IE6 users in 2006. From the article:

For a total 284 days in 2006 (or more than nine months out of the year), exploit code for known, unpatched critical flaws in pre-IE7 versions of the browser was publicly available on the Internet. Likewise, there were at least 98 days last year in which no software fixes from Microsoft were available to fix IE flaws that criminals were actively using to steal personal and financial data from users... In contrast, Internet Explorer's closest competitor in terms of market share — Mozilla's Firefox browser — experienced a single period lasting just nine days last year in which exploit code for a serious security hole was posted online before Mozilla shipped a patch to remedy the problem.

So the questions remains, why would you still be using IE and not Firefox?