> For some reason the article completely fails to link to libsodium: https://download.libsodium.org/doc/

The "bindings for most programming languages" link goes to the libsodium documentation, but I'll add a link in more contexts.

The article offers specific advice for Java-without-libsodium, but it offers no such specific advice for Java-with-libsodium.

There would appear to be three distinct Java bindings of libsodium.

(I'm not ignoring your comment, I'm currently debating whether to update it to include libsodium example code or to write a separate post for that.)

Write a separate post and then link to that from your current post. Best of both worlds :D