> You're missing the point. Even a relatively computer-illiterate person can easily save a PDF to my hard drive, and it's significantly more difficult with HTML. At a minimum you're probably going to get an HTML file with a sidecar directory (or I believe a sometimes browser-specific archive, it's been a long time since I tried since it works so poorly), and even that may not have the content you want to due to dynamic sites.

Ctrl+P -> Save as PDF

You don't need the page to be a PDF to save it as a PDF.