Assuming you're not trolling Ganeden

; it's because when they tried to convert America to Metric they touted, "It's easily divisible by 10!", so Gazz was making fun of the not uncommon American knee jerk reaction to "dividing by 10" being "Evaaaal!!".
If american auto makers hadn't basically been forced to adopt Metric due to non US part suppliers, well, you wouldn't be able to find a metric wrench in the states.
Doubt it's been even ten years since Home Depot started selling plywood in millimeters. Again, foreign suppliers forcing it on us poor 'mericans! :faint:
Edit: and that's only the plywoods thickness, not the larger X n Y, which is still almost exclusively 4 by 8 _feet_
"This world is a comedy to those that think, a tragedy to those that feel..."
I'm laughing so hard I'm cryin...