I disagree, this is very true. Concurrency/synchronization, cryptography are to be mathematically proven: those are not from 99% but from the 1%. The 99% can re

I disagree, this is very true. Concurrency/synchronization, cryptography are to be mathematically proven: those are not from 99% but from the 1%. The 99% can re-use that 1%, and no more than skills you get from high-school is required. For instance, in the 1%, you have accurate floating point calculations: you need mathematical proofs of accuracy, usually requiring maths skills above high-school.