That is what makes it a good example: SQL injection is still a million problems that would need to be fixed in a million places, and will never be. Leap second

That is what makes it a good example: SQL injection is still a million problems that would need to be fixed in a million places, and will never be. Leap seconds are a nuisance and source of bugs in a million programs. Fix them here, fix them there, it will always be wrong in the majority.