Not sure I agree with that. It's possible to add new features with minimal or even no bugs. It requires good engineering, good test coverage, and often good man

Not sure I agree with that. It's possible to add new features with minimal or even no bugs. It requires good engineering, good test coverage, and often good manual QA and even alpha/beta rounds. But it can be done. Is it done today? Sure, some organizations absolutely follow this approach. I would guess, especially in the commercial space, these things are often lacking.