Oh I just gave this a read through -- this is really neat, thanks for sharing, Karen. I have also been a fan of Tiddlywiki but always felt a bit sad about its apparent lack of support for mathematics typesetting. Although I am not too familiar with Tiddlywiki so perhaps I've been mistaken.
How do you like it? Do you have a wiki up somewhere?
For mathematical typesetting, you need the KaTeX plugin [1] (installing an plugin is simply to drag-and-drop it to your own wiki). There is also a plugin for doing calculations in TiddlyWiki but I haven't used it personally [2]
I like it a lot - the problem with TiddlyWiki is that it's hard to describe since its so flexible. I have a few local tiddlywikis that I use for catalogues and note taking/knowledge base. The note taking was inspired by another HN comment [3] that introduced Drift [4,5], which includes features such as tabs for backlinks, keywords, and freelinks.
But you may also find the Projectify edition [6] interesting or one cloning Roam Research [7]
How do you like it? Do you have a wiki up somewhere?
Cheers!