This article is more about how the process of hammering out chips of stone in a tablet focuses the mind on the words than it is on technology. Asimov, King, Heinlein, and DeCamp all wrote about establishing a writers discipline and what it takes to get the job done. This article isn't about efficiency or technology per se. Discipline is about output over a period of time and what it takes to 'make' yourself produce. What this author is talking about is how he disciplines himself to create output. Notice that he mentions his daily time limit. Apparently, a lot of writers have to force themselves into certain constraints to get the job done.
Whatever works for him. Some people still write out their novels in long hand on lined paper.