> it's how critical that infrastructure is to human society Exactly, and the regression horror stories I hear are unbelievable because these codebases are so o

> it's how critical that infrastructure is to human society Exactly, and the regression horror stories I hear are unbelievable because these codebases are so old. A while back, a major customer of this processor transmitted a payment reconciliation file that had bad headers in it and brought down the entire reconciliation system (billions of dollars a day flow through this platform). No basic input validation, no escape hatch for corrupted files, nothing. I couldn't believe it when I heard the story. The crazy part was how long it would take to harden the system against bad input like that because a lot of that code was written 20-30 years ago. People working in modern systems think they know tech debt...