One challenge for a lot of enterprise shops is an addiction to things like MITM middleware boxes, which often lag far behind, and long approval cycles for updat

One challenge for a lot of enterprise shops is an addiction to things like MITM middleware boxes, which often lag far behind, and long approval cycles for updates - demanding that software be repackaged for deployment and the like. The biggest blocker on 1.3 deployment will be that it deliberately breaks middleboxes, which many, many enterprises have as a hard requirement (foolishly, in my opinion).