Is Internet Explorer 6/7 Support Required Now?

Following Google's announcement ending support for Internet Explorer 6, I find myself wondering whether we (Web developers) really need to continue providing support for IE6 and IE7. Especially when creating Web sites intended for technical audiences, wouldn't it be best to end support for obsoleted browsers? Would this not provide additional incentives to upgrade? Recently I and my colleagues had to decide whether it was worth our time to try to support anything before IE8, and in the end we decided to redirect any IE6/7 user-agent to a separate page explaining that the site is not accessible with IE 6 or 7. This was easy once we saw from our analytics that fewer than 5% of visitors to the site were using IE at all. Have you had to make a choice like this? If so, what was your decision and what was the reasoning behind it?

http://ask.slashdot.org/story/10/02/...t-Required-Now