I noticed the same problem.
Even if excalidraw is a quite complete, I’m often still using write by styluslabs and being able to open the notes on obsidian would be great! (proper SVG display would be something - even if the file size tend to be huge, SVGZ support in obsidian would be a dream)
I have a sizable collection of yEd diagrams that I have converted to svg because there’s no plugin for GraphML. Most of them work. Some do not; Obsidian seems to hang for long periods generating a thumbnail, sometimes forever.