I am also using TiddlyWiki, but I just use it locally with almost all the defaults and no fancy formatting.
It's a little different than a traditional wiki in that each "page" (called a "tiddler") is not really designed as a "page" that you view, but rather a snippet, which can be of any length. You can link between them and whatnot as in any wiki.
The killer features for me are support for
* code syntax highlighting
* LaTeX math with KaTeX
* adding in media (pictures, screenshots, etc. beyond just plain text)
* creating dynamic/aggregate tiddlers based on tags. For example, the code to create a list of links to all my tiddlers tagged with both `blog` and `ideas` is:
This is what I've come to love about TiddlyWiki so much. I use it as my personal Zettelkasten for my finance studies, with each Tiddler being a single thought. For example, a recent Tiddler I created was simply:
"Banks have three alternatives for determining operational risk regulatory capital under Basel II
I make sure that each Tiddler has a link off to at least one other Tiddler. This one in particular has links off to my entries on the three particular approaches, which in turn link off to mathematical formulas and other related thoughts. I find by doing it this way I naturally tend to dive more and more in-depth to a particular topic until my Tiddlers are getting extremely specific but then one may link back to a very broad topic and the cycle repeats itself.
By doing this, when I read over my notes, I find it almost feels like I'm having a conversation with them. Just like a normal conversation that you and your partner are deeply interested in, you'll dive deeper and deeper into specifics until another random, broader thought pops up and you repeat the process. I'm continuously surprised about the thoughts I run into as I randomly walk through my notes.
But by far the most important thing for me is that this process has actually made note taking fun! I love it now. Every other system I've ever tried has felt like a chore. I enjoy it so much I'm usually adding several hundred new Tiddlers a day.
About 3 years, and I use it every day. The experiences with the tool are documented in the tool.