yes, actually I have taken a close look already and I will use it. They even integrate excalidraw into the editor. It is amazing. I joined their discord channel a while ago to discuss an issue related to image upload. Currently their example for excalidraw embeds the images as SVG which is a security concern and needs to be changed. So there are some small details that need to be taken care off.
But compared to ckeditor or tiptap it will be much easier to use. To also give a short update on this topic in general:
As said before, modifying the discourse frontend when it comes to something major like this is not a good idea.That is why it is a much better route to implement this functionality as part of an addition to the traditional interface, instead of trying to replace it. The knowledge gained from the work here so far will be used here:
while it is geared towards a web3 usecase and will contain some web3 features, there is no necessity to use those.
So it will be possible to use this plugin to create categories that have a lexical editor. This also means there is much less risk to try this. Because the experiment will be limited to only part of the site.
I am currently still busy with the work on cryptocurrency subscriptions for discourse. Once this is done I will focus again on moving this forward.