The PDFs have 110 pages total, so there's a ton of extra information in there. They're pretty, but there's no reason at all for them not to be HTML - if they were HTML (with linkable headings) I'd be able to link people to interesting insights from them, for example.

I would like a better format, but I like to print things, which PDF is still better than HTML at, AFAIK.

Right - that's the reason to offer both.