For me at least the post wasn't loading on mobile (Firefox on Android) and looks like others had the same issue. Skimming the article just now on the laptop (Firefox on Linux) I see in the images that the author is using a trackpoint on their keyboard, but it's not mentioned in the text anywhere!

Edit: Ohhhh... I see that big box at the bottom that I just dismissed without reading as one of those "continue reading my other articles" chumbox inspired things, is actually a continuation of the article via multiple options. I guess that might be what upset my mobile browser too.

I'm still not spotting any discussion of the trackpoint though...