[kunwon1]

This bit at the bottom was gratifying to read:

  As of 2016, the engineer who did the update still worked at KCG. His entire management chain had been replaced, all the way up to the CTO.

[brazzledazzle]

That's a refreshing reversal from what you usually hear about. You can bet this engineer will never do anything like that again and will likely lead the way toward implementing comprehensive and effective safety mechanisms.

[blantonl]

The amount of experience this engineer has is invaluable.

[jameshart]

It cost $440m. Unclear if it was valued as much.

[paxys]

That sentence isn't as impactful as it sounds. There aren't very many engineers out there whose reporting chain remains intact over the better part of a decade, disaster or no disaster.

[pclmulqdq]

Author here, sorry - it should read that his management chain was replaced (resigned or fired) within the week.