I have used obsidian and excallidraw for my note taking, especially excallidraw for math where I draw with my tablet. But since I started using emacs for programing I would like to move to org roam for school notes. However, I have not found a good alternative program for obsidians excallidraw plugin (I find gimp a bit to big for my purposes).
Gilles Castel (RIP) published a couple articles on taking math notes with Vim + LaTeX which I found eye-opening. In another article he posted about how he integrates Inkscape into the process. If you haven’t read the articles, they may be helpful for what you are doing.
That’s pretty amazing. His notes look like textbooks.
Never used it for notes, but yes inkscape. Inkscape is much more stable than it was in the past imho.