YAGNI as a whole, I've found, is an oversimplified hammer used to justify bad behavior and cutting corners. The engineers that quickly and happily throw around

YAGNI as a whole, I've found, is an oversimplified hammer used to justify bad behavior and cutting corners. The engineers that quickly and happily throw around "YAGNI" have never had to deal with a Sev1 outage whereby you're hemorrhaging money - often because you don't exactly know where your system is failing because you don't exactly have good logging/tracing/observability in place. EDIT: this is not to say it doesn't have utility. As a guiding thought it most certainly does. But it's also easily abused.