KevinF
Member
Is that due to the physics involved with the massive forces being directed on the feet/boots (i.e. you probably want a bit of "give")?
One of the features of stiff boots is that they transmit everything to the ski -- including things you didn't want to happen. You getting bounced around at 70mph is going to transmit some forces into your feet that you didn't necessarily want happening to your skis. Result: soft boots.
Slalom, GS skiers, etc., need their skis to respond instantly to whatever input they give them. They'd probably ski in steel-reinforced concrete boots if they could.