I wouldn't really mind a set of slides if it was formatted to prevent scrollable content, or even if scrolling didn't switch slides.

On the positive side, this slide format didn't destroy my browser history like a lot of them do, so that was appreciated. A lot of JS slide libs add a history entry for every slide, so getting back to the original page that linked it is a giant PITA. I've become accustomed with slides to using the browser's back button menu to jump back, often several times, and I was pleasantly surprised not to have to do that this time.

Not the parent comment, but I would have loved a standalone PDF file. It’s easy to scroll through, so I can resume reading if I know what page I was on. Ctrl-f works across the whole document. E-readers typically can render it fine.

Besides that, I’m a fan of the styling and theme of their presentation. I just wish they hit “save as pdf” instead. I have a collection of PDFs for things like this, and I’m glad to know that they’ll probably work in 10 years — on the other hand, I have no idea if this URL will resolve in 10 years.