[HereBeBeasties]

I honestly don't wish to do the original poster down, but has anyone actually found code visualisation things like this (graph or otherwise) useful, as opposed to just pretty?

It seems like you would only really have need for visualisation if your codebase is complex enough. And if it is complex enough, visualising it is generally something of a mess.

What actionable insights can be generated? Has anyone changed anything as a result of such a visualisation?

It always feels to me like you're better off figuring out which modules you have shouldn't depend on certain other modules and finding only those links. Which is often best done with a simple ripgrep, no?