Thank you for the feedback!

Agree with you about the niche. Diff is our first tool that helps test changes in the ETL code, and the impact is correlated with the size and complexity of the codebase.

Diff also provides us a wedge into the workflow and a technical foundation to build the next set of features to track and alert on changes in data: monitoring both metrics that you explicitly care about and finding anomalies in datasets. We've learned that this is something a much larger number of companies can benefit from.