It struck me how much more useful information the graphs and diagrams here provide over their flashier counterparts you commonly see today.
The old-fashioned aesthetic almost feels like a cue what I'm looking at won't be slop.
Don't worry, I'm sure we can teach a slop generator how to emulate this style. LLMs already know how to use rrttool and mrtg! Coming soon to an Internet near you, faux-historical slop writeups.
Some of these charts are made using rrdtool:
https://oss.oetiker.ch/rrdtool/
rrdtool is still used widely today by projects like Munin, LibreNMS and Collectd.