In 70 years, articles will talk about the strange drone invasion only for it to be discovered that planes and drones were always in the air, but people just never bothered to look up until everyone started talking about it.
I worked on a project where we handled the results of an API call. For testing we mocked the various API call results. When we went live, we discovered they had changed the results of the API call. All the testing was worthless.
Still, I hate having bugs in my code and strive to make sure they don't happen. Still I have had managers release my code when I tell them there are active bugs being worked on.