While we're here, let me go ahead and once again give much praise to https://zim-wiki.org , my daily driver for most things in my life.
It was really interesting to see the sort of "second stage" discovery of things like this when obsidian got hot, and I toyed with many of those for a while.
And the end result was me getting even further back into doing what zim does, and even finding new cool little time savers (e.g. interwiki links).