alt Hacker NewsWorked fine on the target machines and the "0.5x programmer" got to see their family for winter holiday. Or are you saying they should have defensively programmed around a bug manifesting 21 years later and skip seeing their family during crunch time?
To be honest, I just don't like how you disparaged the programmer out-of-context. Talk is cheap.
Using a well–written third–party library would not increase the development time; it would in fact reduce it. No risk of missing Christmas there.