For the longest time, ski boot soles have adhered to their current shape, which is DIN homologated. For the longest time, skiers have complained about how hard and dangerous it is to walk around in ski boots, especially on smooth wet floors and staircases.
Yet, there are better boot sole standards out there. My Garmont Endorphin boots came with a set of Vibram rocker soles, with an antifriction plate, to facilitate release in a ski binding, much like the WTR boot sole standard. They are easier to climb with, walk around and certainly safer on silippery surfaces. Their only downside is that they require a binding with adjustable toe piece height.
What surprises me is that the ski industry, which is always eager to sell us something new, has not attempted to move away from the current and antiquated DIN boot sole standard. Why haven't they?