IE is a cancer. If you can in any way justify cutting off support for IE, you do it. It's a real time and money sink.
Of course now that IE is supposed to work they won't let you use the conditional comment targeting method so I must - it seems - break it for IE11 by instructing all IE above 9 to fallback to IE9 compatibility mode.
Nothing else seems to fail with it and applying the hack (IE9 compat mode in a meta-tag) is problematic too.
Has IE changed that much?
That said the site is an application generated mess, it's painful. So maybe IE have really come around.
The problem is old IE. fuck old IE and every bit of its ridiculous, antiquated and outdated self.