That looks nice but it's a shame that it uses its own proprietary language (not PlatUML or MermaidJS) and the code isn't even available. So if you use it then y

That looks nice but it's a shame that it uses its own proprietary language (not PlatUML or MermaidJS) and the code isn't even available. So if you use it then you have to cross your fingers that the website continues to be available otherwise your diagrams will suddenly become unmaintainable.