Oh guffaw. The time has easily come where we are allowed to say "no" to several browser versions, or at least ignore them. Even Google has dropped support for IE6.
Supporting several browsers does not mean that a website has to look perfect in all those browsers. My sites will look good on the latest version of Chrome, IE, Opera, and Firefox.
Users of IE6/7/etc are already self-inflicting harm on their own web experience, why should we care to cater to them? They can have the website I display, but I'm not building the site for the past.
I don't care if previous browser users see the Best Of All Possible Websites, as long as they see something. And since I'm developing Canvas apps, I don't care if some of them see anything at all.
I imagine IE will reluctantly take the road of Chrome or FF and be more insistent about updates, especially outside of the corporate world. I also think that in the future the consensus will be that there isn't anything wrong with dropping support for aged browsers, and just displaying one "simple" site version to them.