Or for sysadmin or anything where a quick plot at the data gives you hints at what's happening.

In the example screenshot I put on https://raw.githubusercontent.com/csdvrx/sixel-gnuplot/maste..., I was investigating time sync issues.

A plot immediately told me my first fix had corrected the issue on 2 servers, but I had mistakenly applied the same change to a 3rd one.