That is truly impressive. I have a hunch though, that it is not well suitable for proper diagrams, due to all the things like wrapping text that is too long for

That is truly impressive. I have a hunch though, that it is not well suitable for proper diagrams, due to all the things like wrapping text that is too long for a line inside a shape, inside the shape onto more lines. Dynamically wrapping text when a node's size changes. Moving edges when nodes are moved. All those things one takes for granted in an actual diagramming tool.