I've tried creating diagrams of this nature (not realizing this is a thing) but I chose them for documenting the system to others that weren't already familiar with the project so it felt necessary to layer it all together. Those diagrams shown looked more like team meetings hashing out the details. Seemed kind of an unfair comparison.
That being said, the biggest issue I ran into is in the diagram tooling. At the time we had Gliphy. One could not make it interactable, such that double-clicking on a node would explode the container and let someone drill-down. At best they had layers which were awfully crude to work with. And at the end of the day didn't export in SVG so were useless for embedding. Overall, a waste of time. :(
That being said, the biggest issue I ran into is in the diagram tooling. At the time we had Gliphy. One could not make it interactable, such that double-clicking on a node would explode the container and let someone drill-down. At best they had layers which were awfully crude to work with. And at the end of the day didn't export in SVG so were useless for embedding. Overall, a waste of time. :(