There's no reason to avoid supporting IE8. On the contrary, once the kinks are worked out of it, web app developers would be wise to help as many users migrate

There's no reason to avoid supporting IE8. On the contrary, once the kinks are worked out of it, web app developers would be wise to help as many users migrate to IE8 as possible. That is true even with IE6 vs. IE7 but it is especially true with IE8.