I think we’re going to drop IE9 support starting in 2016.
Now that Windows 10 is just about out (by the end of July), and Windows Edge / IE12 will officially be released with it, this means our IE support matrix would be
IE9 has always been a pretty terrible experience for Discourse because it lacked
pushState support, so the URL in the address bar never changed… and it was the ragged edge of “kinda works, but may not look great” that represents our absolute minimum browser platform.
If you have any objections to this, please make your case here.