Show HN: Convert between Mermaid, draw.io, and Excalidraw diagrams

> even if it's "this isn't useful because X."

OK... this isn't useful to me because I now just only use mermaid and stopped using other diagraming tools, because mermaid can be embedded now in so many places (github, in-browser editing/rendering, shareable URL, python etc), can be easily saved as text and edited (whether manually or programmatically), there are no IP issues, etc. So more useful for me would be, whatever you need to use something other than mermaid for-- do what it takes to make mermaid fill that need, so that there is no need to use anything else.