I'm excited about this. I've used Excalidraw as a simple, lo-fi interviewing tool at a few companies for when we want candidates to draw something without having too many tools to get bogged down in making a masterpiece. For me it really hits the sweet spot between being fast and flexible like a whiteboard while still working well for computer input (i.e. doesn't make you free draw with a mouse).

It might be worth adding a toggle to the marketing website alongside dark mode to switch the handwriting font to something more readable though

nice tool but I'm a fan of draw.io, opensource and can be downloaded to your machine to run locally if wanted.

There's a docker image also: https://hub.docker.com/r/excalidraw/excalidraw

It's hard to tell exactly, but it sounds like the "plus" version would just have more collaboration functionality.