In theory, it appears that the articles are supposed to be self contained Git repositories. In practice, this article loads a bunch of assets from Google's Cloud Storage. Blocking them appears to partially break various bits in subtle ways - figure 6 is particularly bad. It also fails to render correctly without a couple third party scripts hosted by Cloudflare. It's hardly an ideal state of affairs.

Articles that aren't self contained make it frustratingly difficult to view offline copies. They also raise the possibility of the publication changing over time as anything hosted by a third party is outside the control of the journal. This lack of an immutable version is highly concerning because it means that no single canonical form exists for incorporation into the scholarly record. (Note that even redacted, entirely fraudulent papers have traditionally remained available from the original publisher with appropriate warning labels attached.)

Reflowable text and interactive figures are very welcome additions, but the concept of a mutable scientific literature is absolutely horrifying.