It’s overloaded and has recently been made obsolete by splitting it into two new commands. There’s nothing wrong with personally continuing to use it, but adopting the new vocabulary might help make Git less confusing to others.
That's a good point IMO and that's why I still find nomnoml my favorite https://nomnoml.com/.
However, nomnoml is more like UML tool than diagramming tool like OneModel. So a big issue could be how to keep all the icons in the text format. With SVGs, the file would be big/or would include some extra assets folder, or with the links directly hosted on OneModel, the file would be tightly coupled.
I think the solution works for you now but wouldn't be better if you move those recurring queries to a dashboard that people can check the results themselves whenever they want?