Defining metrics, dashboards, and themes as plain files in a repo fixes the thing every BI tool eventually breaks on - you can actually diff a change, review it in a PR, and roll it back like normal code instead of hunting through a GUI trying to remember who edited a chart last month. Deploying anywhere for free instead of being locked into one vendor's hosted dashboard is also a real advantage for a small team that just wants their metrics in version control next to the rest of the codebase.
Evidence