Hi CCE,
It’s grip flexibility for me.
My main reason for choosing the Classic Ikon handle is the freedom to move forward or back: forward for control; back for power. That freedom takes full advantage of the thick to thin tapering. If I need to chop through a chicken bone using the thick base, I need all the power I can get, so I move back on the handle. If I want to do detailed work near the tip area, I choke up to a pinch grip.