Well the first is a discussion without an analysis of existing code, the second is about smart contracts. I'm not convinced that _cyclomatic_ complexity of a function plays a role in security at all. Why:

(a) We have plenty of evidence that buffer overflows etc play a role (caused by using manual memory management), but not so for cyclomatic complexity.

(b) Trying to reduce cyclomatic complexity in one function typically increases the complexity somewhere else, and so is not helping. Often this is just moving stuff around, and sometimes makes things more complex.