"He who marches out of step hears another drum." ~ Ken Kesey
Panels are ok but the corners are a little too soft for our taste. We use bolt mesh for more control in that area.
If you are a machine operator you most likely buy panels...if you are a machinist you most likely buy bolt material. At the end of the day it comes down to balancing production time, effort and money and each of us get to decide how to manage that balance.