Here's a pic of user pvalchev leading WI4 in Canada wearing a pair of strap-on Petzl Vasaks -
Granted that was a while back -- a few years later I saw him lead WI5 in Petzl Sarkens, and he's now wearing M10's. But still ..
This guy was climbing a WI4+ pillar wearing the exact same crampons (strap-on vasaks) -
So it is not necessarily the gear that is holding you (or me) back