This article from The Chronicle of Higher Education called "Hamlet.doc?" starts out with a nice discussion of the multiple Lears and Hamlets problem. No scripts exist in his hand. We don't know when something is his own idea, or a memorial reconstruction from his actors. Sometimes it's just a plain mistake, and we might think it's perfection.
Then the article goes on to say "but what if Shakespeare was using a word processor?" He could have made backups. He might have had version control. Tracked changes. "We might have learned that the play was originally called Great Dane." :)
The article uses a term I quite like, "born-digital." Literature, in other words, that has only ever existed in digital form. We in the software world like to say, "As soon as you print it, it's out of date."