I think I've seen this plot at MOMA or somewhere. It's kinda industrial revolution style.
(It's also not useful. Looking at it, you might think speeds are increasing over time; in fact, it's just the number of samples that is increasing over time, which shows the progressively-less-common higher wifi speed bands more and more, while the more-common lower speed bands get completely saturated with samples. On the other hand, this gives a clue about how the modern art version of this painting was created: spraypaint and stencils, with progressively longer exposure times in different sections.)
This chart shows over 500,000 individual Gattaca test samples.
ssh+2FA to all your machines, anywhere, without opening firewall ports.