Without really trying to, I just submitted a book review for publication without printing a single sheet of paper during the composition of it. I did all my revisions on the laptop screen.
This is a new experience. The most surprising part is that I didn’t intend to do this; it just happened. I do my writing on a laptop that is only occasionally connected to a printer (and haven’t yet gotten to the point of wirelessly connecting to a printer).
I have yet to decide whether the revisions might have been better if I’d marked up a hard copy instead of revising on screen.