[ageitgey]

I don't know, there's been some pretty bad software mistakes, possibly bigger than a PR to convert an app to Rust:

https://en.wikipedia.org/wiki/Therac-25

[PyWoody]

Can't forget Knight Capital: https://en.wikipedia.org/wiki/Knight_Capital_Group

[auguzanellato]

I hope no one ever builds (or even worse, vibe codes) a radiation treatment machine.