The IE6 compatibility issue should be mostly a thing of the past now, except for some corporate settings and china. But I feel IE8 will stay with us for a long time with a few annoying percentage points that can't always be ignored - and by now it's almost as bad as IE6 was 8 years ago. The only thing that makes the situation better than before is the much higher adoption of FF and Chrome, which at least keeps IE8 users at single digit rates for consumer websites.