For me was interesting that all digits in ASCII starts with 0x3, eg. 0x30 - 0, 0x31 - 1, ..., 0x39 - 9. I thought it was accidental, but in real it was intended. This was giving possibility to build simple counting/accounting machines with minimal circuit logic with BCD (Binary Coded Decimals). That was wow for me ;)

And this is exactly why I find the usual 16x8 at least as insightful as this proposed 32x4 (well, 4x32, but that's just a rotation).