My company has recently decided to ditch support for IE6-8 when we roll out a new front-end design (and a handful of features). Any time our CEO and designer would dream up something new, they would come to me about, and would leave with an asterisk slapped on it which read "except in older IE". It prompted us to really dig into how much of our user base was even using IE6-8, and it was shockingly low. Shocking when you consider that many of our users are restaurants, who often just have a machine in the back running Windows WhoCaresHowOld Edition.