Thanks for the feedbacks very relevant.
One thing I should clarify about the project: the GitHub code can be deployed as a Streamlit app directly inside a customer's Databricks workspace. The idea is to keep the cost analysis close to the system tables and avoid sending the data to an external service.
I also tried to publish it as a Databricks Marketplace app, but it wasn't accepted. So I decided to share the project openly with the community instead.
If there is enough interest, I'd be happy to evolve it into something that can be deployed more easily inside enterprise Databricks environments, especially around security, governance and deployment.