[Zelphyr]

> IE9/IE10/IE11 dont even render the same page the same way

One could argue this is because each version is better than the previous. "Better" being relative here.

> they make money by making their os obsolete

This touches on a possible source of the problem. Their insistence on tying browser upgrades to major releases of Windows proves they care more about the revenue from the OS sales than they do about not breaking the web.

I'm encouraged that they have automatic updates now but the jury is out as to whether they'll make use of it in the way Chrome and Firefox have.