It has often been remarked that IE is a headache for developers -- in part because Microsoft tends to prefer its own versions of web standards. With IE10, take advantage of the evolution of web standards with even more HTML5 access and features.
The Retirement of Internet Explorer
On the other hand, quite a few 'modern' web technologies -- including XHR -- were originally Microsoft innovations, only later adopted by..well, everyone else. Today, Microsoft has a brand new version, known as Microsoft Edge, as Internet Explorer 11 is set to be retired on June 15th, 2022, meaning there will no longer be support provided for users or developers alike.