See my sister thread where I worked at Knight just after the outage. > For 8 years they left unused code in place, seemingly only bothering to remove it becaus

See my sister thread where I worked at Knight just after the outage. > For 8 years they left unused code in place, seemingly only bothering to remove it because they wanted to repurpose a flag There was another issue where they were using a database with only 256 columns. Sometimes, they needed a new column so they would just reuse an old columns that "wasn't being used at the time". IIRC, this was generally acknowledged internally to be "a bad idea" but no one had prioritized cleaning up the old code and/or coming up with a better best practice.