Good article but my god why is there like a 2 second delay before every user interaction on this page. Scrolling, selecting text, everything has some kind of 2 second 'bootup' time after which things work normally but if you stop interacting with it for a bit it goes back to some idle mode. Really weird.
As others noted, the latency is from a whole slew of trackers that privacy extension would block. Maybe this is a good nudge for you to go install one. It's a problem that's already widespread and will continually get worse.
But on top of that, this is also one of the many fun examples of where a static, linear document that's so simple it could have been written in markdown requires megabytes of download across dozens of files.
Nobody cares about user experience right now -- it's all about developer and content management experience, so runtime bulk and responsiveness are ignored in favor of... whatever these kinds of developers think they're gaining on the production end. I often have a hard time guessing what that is without assuming the responsible devs are not-so-great.
