When Airbus introduced its fly by wire systems, there were quite a few airframe losses caused by incorrectly handling the moded interface, including their test

When Airbus introduced its fly by wire systems, there were quite a few airframe losses caused by incorrectly handling the moded interface, including their test pilot dropping the A320 at the Paris Airshow. The crases were universally attributed to pilot error. If you have muscle memory trained in one system, you tend to revert to that behavior when under stress.