(I’ll make a longer post about keyboard driven workflow and commands when I have time.)
Making user scripts is pretty fun (thanks @UMNiK for the suggestion :D) and there are many ways to extend RemNotes functionality this way (e.g. [
 User Script] Toggle Sidebar and Resize Pane Shortcuts and snippet/template manager).
But there is one thing that is not possible with a react app:
- Focusing a rem to edit (aka clicking on it, see Stackoverflow: Simulate click event on react element) [At least I was not able to do it with my limited React skills. If it is possible a snippet would be appreciated! Otherwise this can be implemented with a 
refI think, see Stackoverflow above or here] 
This alone could go a long way. Like enable us making a pane switcher or vim-mode like in roam-toolkit.
Additionally I’d like to be able to:
- Navigate to another rem without page reload (I did not manage to make the History API do it).
 - Insert text into a rem, like triggering a paste action (which is blocked for security reasons.) This can be done by exposing 
Editor.insertTextas shown in https://docs.slatejs.org/concepts/04-commands.
Roam has an advantage here in hackability as it uses plain text areas. 
This is a preparation for/first step towards Native Plugins (Custom JavaScript).