[yarcob]

I assume they just mean that they get too heavy for practical use. They stated that they offer boards with a thickness of 30-40mm, they just don't offer panels of that thickness.

At a density of 1200kg/m2 it's almost twice as dense as some other hard woods like walnut (~650kg/m2) or particle board (~700kg/m2).

I guess for a kitchen countertop it wouldn't matter (stone countertops are popular and even heavier), but for most furniture it would probably be just way too heavy to be practical. Someone needs to be able to carry your furniture :)