The fact this data is used as a measure and therefore cannot be exported or attached to a field doesn’t make sense to me. The calculations are being carried out, and the output surfaced, as a result, we should be able to access and/or export this data. If we are able to report on time spent in deal stage, and even have default reports to provide that data, exporting should be a no-brainer. Please add this feature, creating manual workarounds using workflows doesn’t work retrospectively.