Supporting IE has nothing to do with how well it renders a site.
Supporting IE carries massive baggage as you have to pin yourself to Microsoft's erratic, tactic based release cycles and limiting yourself with future features. Chrome and Firefox now how have rolling releases and are closely tied with the developer community, so new features and rendering uniformity is what you gain.
There's also the ethos you buy into by supporting IE: you're supporting a closed source, proprietary internet.
Supporting IE carries massive baggage as you have to pin yourself to Microsoft's erratic, tactic based release cycles and limiting yourself with future features. Chrome and Firefox now how have rolling releases and are closely tied with the developer community, so new features and rendering uniformity is what you gain.
There's also the ethos you buy into by supporting IE: you're supporting a closed source, proprietary internet.