I took a few carving classes with a master German wood carver, carvers use bevel down. Chisels are used bevel down for carving so is my drawknife.
A plane uses bevel up because it helps to draw the blade down into the wood, luckily there's the sole of the plane to stop it from continuing its downward progression. So if bevel up draws a blade into the wood what does that tell you? I tells you that bevel down allows greater control.