> No [x] to close these 1980's text editors either. X was commonly used to delete characters in-line, but not to close the program. Not quite true. In Vim, :x

> No [x] to close these 1980's text editors either. X was commonly used to delete characters in-line, but not to close the program. Not quite true. In Vim, :x means ‘save and close buffer’, and is a synonym for :wq. (Not sure if this was present in earlier Vi or not, but I believe it was.)