I am confident that my code will fail spectacularly someday. This is why I think a lot about possible failure modes, but I am also quite confident there will be

I am confident that my code will fail spectacularly someday. This is why I think a lot about possible failure modes, but I am also quite confident there will be some I didn't think about, and they lurk somewhere awaiting the opportunity to manifest themselves. Which is why I invest heavily in alerting and monitoring services, but I am confident that someday, they will fail me too, or two bugs simultaneously somehow will create an illusion that everything is fine (and report it to monitoring), but it won't be fine. I accept the inevitable. Compared to the fact that someday I (and everyone else I know — I don't believe in mind transfer and biological immortality) will inevitably die, this is a small thing to accept. I work in high frequency trading.