> Electron is a framework in a very different sense than the "JS frameworks" op is asking about.The OP doesn't have a good understanding of what they're asking about, and that's okay. That's why they asked the question.
The linked thread is titled "What framework did the developer use to create Obsidian desktop application?". It's not asking about a web application and specifically referencing a desktop framework with: "He must be using some sort of desktop framework in order to push this out simultaneously right?".
> The latter is about libraries with APIs and mental models for producing the UI & UX of web applications.
Obsidian is not a web application. It is a desktop and mobile application. There is presently no Obsidian web application. So it would be odd to be asking about web frameworks for a non-web desktop and mobile application.
> Electron is just a way of running Chrome without the Chrome UI around it, + a few APIs for accessing native OS APIs.
No, Electron is a complete Javascript-based application framework. It does so much more[1] than that.
1. https://www.electronjs.org/docs/latest/api/app