Covid. There have been significantly fewer flights than usual over the last year. The argument is that pilots and ground crew are less busy, with bigger gaps b

Covid. There have been significantly fewer flights than usual over the last year. The argument is that pilots and ground crew are less busy, with bigger gaps between work, the result being that they are "rusty" for want of a better word, and so more prone to making mistakes/oversights. This seems plausible, but hard to know.