I developed tools related to this, and have some guesses why some people see value and some don't: 1. A lot of the diagram-based modeling/visualization languag

I developed tools related to this, and have some guesses why some people see value and some don't: 1. A lot of the diagram-based modeling/visualization languages and tools are too simple, or poorly rendered, missing most of the potential value. (For example, for some product segments I knew, sold via enterprise sales, most of the offerings seemed to be developed by people who didn't use it themselves, and didn't have guidance from a domain expert.) 2. A lot of the examples people see of them are too simple, and often just plain wrong. (I was lucky to have a colleague explaining a complicated system by talking people through a rich diagram, and it was borderline epiphany. Then later I saw product managers and engineers make diagrams that were obviously incorrect/nonsensical, and otherwise weren't useful.) 3. I have a suspicion it might also sometimes involve some people having different "visual" or "spatial" thinking than others. Given a rich diagram in a familiar standardized visual language, do some people reason about it more visually than others, who are, say, reading it more like verbally, and reasoning from concepts that way?