We've seen one counterexample recently: NASA Perseverance Rover.
They emphasized that this was their first time of running everything in the real environment although I'm 99.999984% certain that they've tested it in the closest setup as possible. I'm also certain that there must have been a few glitches here and there, but the overall system worked. There's a process of mitigating and containing the faults and failures, and NASA is known for that.
I don't disagree with the principle of OP, but just repeating it in a dogmatic way doesn't make things better. I want to see practical examples and ways to fill the gap (between the dev and prod).
They emphasized that this was their first time of running everything in the real environment although I'm 99.999984% certain that they've tested it in the closest setup as possible. I'm also certain that there must have been a few glitches here and there, but the overall system worked. There's a process of mitigating and containing the faults and failures, and NASA is known for that.
I don't disagree with the principle of OP, but just repeating it in a dogmatic way doesn't make things better. I want to see practical examples and ways to fill the gap (between the dev and prod).