Do we have the optimal bindings for slalom?
If a hard/stiff shell boot is optimal for control over a very small edge like a roller-blade or hockey skate without breaking an ankle - How does that make it optimal for a slalom ski are rubber bindings really better from a performance aspect?
A narrow edge is very unstable laterally, and therefore it makes sense to have a hard boot to stabilize the foot and ankle to improve control and reduce the risk of a sprained/broken ankle. However, a skateboard for example is far more stable, and using something like a hardshell would be terrible as it would kill your ability to balance on the board.
Is it safe to make the following generalization in order to preserve our ability to 'balance' on a given object? - As the object we are riding becomes narrower or less stable, the more lateral stiffness we need to have. Conversely, the wider the object the less lateral stiffness we would want to have.
For example, has anyone ever seen a super stiff hardshell 4-wheel roller skate? No, and it is almost obvious as to why. The hard shell would make it much more difficult to move your body laterally without losing balance or having 'too much' leverage over the skate. Those shells are very low and below the ankle, and use mostly the foot for security, and do not restrict the range of motion of the shin above the foot.
What characteristics do you think are necessary for optimal binding performance? Should both the front and back foot on a slalom ski have the same level of stiffness and control?