It is also very field dependent. I worked on a web project where we could deploy with a line of command. Also worked on a project where "testing the new version

It is also very field dependent. I worked on a web project where we could deploy with a line of command. Also worked on a project where "testing the new version for real" meant that we had to charter an airplane, hire a pilot, drive to the airport, strap things to the aircraft, calibrate the system and then get airborne. Understandably this changes the cost of errors, and thus people's attitude to quality.