In the world where 99.9% of the screens are already thread short (think 16:9, 21:9, 23:9, evenmore:9), vertical space is at super premium and yet the result screen is under a horizontal split.
Given the fact that on a standard 1080p monitor the 80 symbol delimiter is way off to the “left” from the centre, maybe it would be a great idea to use a vertical split instead as the old playground used to be?