The best way to run Windows Server is without a desktop installed, using PowerShell to manage it. Even one-offs. You might know this but it’s worth saying just in case. Also worth noting that some server applications assume/require a desktop during install or operation (usually because they’re trash).
If the metric is high, users are spending too much time on it. Also, it is responsible for every single frustration that users have with your product.
If the metric is low, the feature can be safely removed (see: Windows Start menu).