software is never 100% bug free. and it was never supposed to be.

even the best engineers can't test every possible input. there are too many. and the math actually proves you can't fully prove a program is correct.

so the goal was never zero bugs. it's managing risk down to a level that fits what's at stake.

a todo app and a pacemaker have very different bars.

good engineering isn't perfectionism. it's knowing which bugs matter and letting the rest go.