Or we could adopt a number system that has actual, proven arithmetic benefits. See the Kaktovik numerals (https://en.wikipedia.org/wiki/Kaktovik_numerals https

Or we could adopt a number system that has actual, proven arithmetic benefits. See the Kaktovik numerals (https://en.wikipedia.org/wiki/Kaktovik_numerals https://en.wikipedia.org/wiki/Kaktovik_numerals). As a bonus the numerals are all one single stroke, so it's super fast to write! Though, the benefits to calculation come from the fact that the numerals are iconic, not due to it being base-20.