I don't really follow. How does this author converting their entire site to PDF help readers/visitors/users?
The original HTML site[0] was printable as PDF, and save-able as both HTML and "Web page, complete", all of which result in a well-formatted & readable offline experience. (It was also responsive: very readable on mobile, but that's an aside).
The new PDF site is not accessible to some, difficult to read on mobile, and interacts poorly with all of the norms web users are accustomed to (back navigation, anchors, etc.)
It's the difference between "this thing has X property" (termination or able to save for offline reading) and "this thing _obviously_ has X property, in a way that you can tell without any expertise, or doing any investigation".
How important this is to users, or whether it is worth it is something I've not commented on, but it is a difference.
The original HTML site[0] was printable as PDF, and save-able as both HTML and "Web page, complete", all of which result in a well-formatted & readable offline experience. (It was also responsive: very readable on mobile, but that's an aside).
The new PDF site is not accessible to some, difficult to read on mobile, and interacts poorly with all of the norms web users are accustomed to (back navigation, anchors, etc.)
[0] https://web.archive.org/web/20130127175816/http://www.lab6.c...