It was a bit annoying until displays with reasonable vertical resolution became widely available. There were way too many displays with shitty low resolution, b

It was a bit annoying until displays with reasonable vertical resolution became widely available. There were way too many displays with shitty low resolution, but you only get those in the shittiest bargain-basement monitors now. I'm using a 27" 1440p monitor at home (bought it ~4 years ago), and it has plenty of space to comfortably show two full-size pages side by side, with plenty of space left over for toolbars and such. Or two 1280x1440 windows, which is a very handy size, giving me the equivalent of two portrait-mode monitors. Most modern WMs (and even Windows!) have window snapping/tiling that makes this very easy (win+arrows). Aspect ratio isn't really an issue anymore, as long as you have enough vertical resolution, and the additional horizontal space is nice for tool windows and such.