1. You will never be able to fix all bugs. There's plenty of bugs in your software right that that you are simply not aware of. 2. Bug fixing has diminishing r

1. You will never be able to fix all bugs. There's plenty of bugs in your software right that that you are simply not aware of. 2. Bug fixing has diminishing returns and exponential costs. If you accept these two axioms, Zuck's quote makes perfect sense. And certain bugs are simply not worth fixing because cost of fixing it is higher than cost of having it.