Most i3 setups there are for showoff; cwm has better defaults and conmuting between tags it's far more manageable than fighting with tiles where often the window resolutions are either useless or scramble your content.
Also most fluxbox or *box users will have far better setups than i3 ones because they use their actual setups to do actual stuff instead of posting screenshots.
Heck, Kernighan was one of the original developers of Unix. In 2015 he was already coding for more than 40-50 years, more time than most from Hacker News are alive. The only constant from that time is the terminal, so no wonder most people in the post gravitate towards that
I can say I know computers and how they work pretty well, but these days I have much better things to do to learn the best way to themes my shell so that it matches my waybar, and that both switch colourscheme when dark mode activates. I could learn if I wanted, but I’m not a teenager anymore; I don’t care. Incidentally, when I had the time concern myself with GTK themes and wallpapers and Compiz, my knowledge in computers was a tenth of what it is now.
It would be like saying a car decorator is the most expert of mechanics.
The background?
xsetroot -solid gray20
I never understood the trend on dark/bright modes; the gray themes from my childhood/early teens with W98SE (and used by Mac OS 7/8 too) are just neutral and barely 'sit there'.