If you had said "phone" I would have some sympathy, but "tablet"? Seriously? You act like two columns is somehow ridiculous, but magazines and newspapers also a

If you had said "phone" I would have some sympathy, but "tablet"? Seriously? You act like two columns is somehow ridiculous, but magazines and newspapers also all use multiple columns. You only see single columns on narrow formats like handheld books (most paperbacks). A tablet is large enough to show an entirely page at once at a reasonable font size and you want two columns for that. If anything the technological restriction issue is that it was hard to make a two column typewriter so typed, instead of typeset, documents often have a humorously large single column. (Even on a phone it just isn't difficult enough to read that it deserves such hate.)