> One feature I like is that you can neatly cut out a 64-character 6-bit all-uppercase encoding (like DEC's) if you don't need lowercase.

And if you take the digits from the 0x3X column and the non-digits from the 0x2X column (flipping one bit), you get 0123456789*+,-./ which is enough to write numbers and the basic arithmetic operators. This too was deliberate.