This project is inspired by TiddlyWiki, which is from 2004, and apparently still going!
TiddlyInstall appears to be unrelated (and not by the same author?), and serving a very different function. The only similarity is the "single HTML file" part?
---
Previous discussions on TiddlyWiki for context:
Why every programmer should have a Tiddlywiki (2011)
https://news.ycombinator.com/item?id=2913670
TiddlyWiki: a local, single-page wiki (2017)
https://news.ycombinator.com/item?id=13523660
Tiddlywiki – A non-linear personal web notebook (2018)