On the one hand, as a technologist, this pisses me off because we've advanced so far in the field of word processing. Autocorrect, holding more than 40 pages in memory, cut/paste, etc. Why does this Luddite persist in the old ways?!?!?! But as a writer who knows the pains of distraction... maybe he's on to something?
That's probably the first thing a lifelong professional screenwriter would turn off.