This is the best free (and open source!) tool for making images inside the browser:

An the plugin, which integrates this into Obsidian is the plugin with the most downloads:

Currently I can export the image as PNG, paste it in my note and save the excalidraw file, and if I later want to edit it, I need to locate the file and replace the PNG.

Making the excalidraw files embeddable or making direct support of opening the drawing editor inside recall would be cool.