I have been amazed how many really good linux people will close and re-open a file in vim because they dont know how to undo. Its weird to me how people will s

I have been amazed how many really good linux people will close and re-open a file in vim because they dont know how to undo. Its weird to me how people will spend weeks learning openstack or kubernetes in depth but never think "there must be a way to do this..." or get round to googling a 5 minute basic command tutorial for the text editor they use every day.