Iris Murdoch wrote twenty-four novels. Each one was "written in longhand and taken up to her publishers in London in a capacious paper bag by the author herself. 'Longhand, yes,' she said. 'I have never touched a typewriter, and still less a word processor. It is natural I should take it up myself. It's the only copy, after all.' Once handed over, her novels are printed as written, unedited." (From The New York Times)
Like Heidegger, she thought writing by hand possessed a "particular closeness."
She is also supposed to have said: "The word processor is... a glass square which separates one from one's thoughts and gives them a premature air of completeness."
All I can say is: This is not my experience, but then I have never experienced this kind of "completeness" even after my stuff is published. I am never satisfied, and have good reasons never to be satisfied (as Iris Murdoch could be). It's a moral failing!