The MindMap functionality sounds really interesting, I’ve not yet used Excalidraw so will take a look.
As context for my PKM workflow/needs from Obsidian, I would love to be able to create in Obsidian my own visual linkages between notes, hyperlink-style in a hand drawn graphic - as an alternative to graph mode’s automated maps. This would suit my thinking-on-the-fly style of note-taking which consists of a lot of concept-/mind-mapping. I tend to create maps as a way to integrate new ideas with existing knowledge, and as a way to brainstorm (for example for writing projects, or for product development).
I’m currently doing all my mind mapping in the Concepts app on iOS (also available on Android), but it has no hyperlinking functionality so currently the only way I know of creating this sort of document is as a separate step within a slides-type app (Keynote/ Powerpoint/Slides) or desktop publishing app, but this is very clumsy and only really suitable for “sharing ideas” that you’ve already “thought about” in some sort of final design format, like an infographic, rather than as part of the “thinking workflow” that Obsidian is so good at supporting.
It may not be immediately, but I’ll be sure to let you know how I get on.