Re: secure in the knowledge that nobody will see his code
I have worked in closed source. And all the really gnarly bits of code get left alone.
"Gary wrote that, he understands it, I don't, it passes some tests : approved"
I spent about 3 days trying to empirically demonstrate a bug. Turned out to be an off by one error. And while they were in fixing it, because it was the first time anyone but the original author had checked it, properly they found a calculation that had been optimised out of the loop that needed to be in the loop.
This on very specialist software selling at 100s of £k per seat. We just released the new version as "optimised and improved accuracy" and never told anyone what was in it.