Ask HN: Would it be useful to see directed graphs of user journeys?

Im building an analytics tool that aggregates and plots user journeys through an app or website. They are visualized as a directed graph of a user moving between pages/screens.

Im doing this because its quite difficult with traditional tools to get a simple view of how users are using an app, and how this changes over time and by type of user.

Aggregating these graphs to show the paths "most users" take is relatively complex, before I embark on it I was wondering if anyone else would find this useful?

If so I may consider building a more versatile version for others.