As for the multiple editions, in the case of a truly great writer - Shakespeare, Emily Dickinson, Proust, someone with a canon - there is often a "variorum" edition of the work that presents its variants. I think publishing most other writing that way would be impossible, economically, for publishers, and very ill-advised for authors.
Judith ThurmanEvery dreamer knows that it is entirely possible to be homesick for a place you've never been to, perhaps more homesick than for familiar ground.
Judith ThurmanThe border between editing and ghostwriting is, at its extremes, a bit porous. An editor really improves and sometimes restructures a manuscript and suggests changes.
Judith Thurman