I mean the math given showing the size for an actual ~$1M cube is substantially smaller is pretty compelling. The author puts forward the explanation that there

I mean the math given showing the size for an actual ~$1M cube is substantially smaller is pretty compelling. The author puts forward the explanation that there may be voids in the cube instead of an additional $500k, but that doesn't really address the problem that this isn't the right size for a $1M cube.