Hello again Samarium, I don't know what you think about building a desktop editor with ElectronJs for RPG-JS, the engine is currently great although I see that it is still focused a lot on devs who know Js/Ts, it would be great to make a tool like this to reach to more people, I think the most complicated thing would be to make an events system like RPGMaker has, I know your hands are super busy, but at least I would like to start with a scaffolding to have a base as an editor.
Example code -> https://github.com/electron-vite/electron-vite-vue
The great thing about this code is that it comes with Vue, Vite and Electron, comfortable technologies to continue working.