Time in status category for custom status categories

Aha recently introduced the possibility to define custom status categories, which is great. It would be nice to have the possibility to show the time an item spent in the custom category, but today this is only available for the standard categories

This would greatly help to monitor items (e.g. ideas) by the time they spent in a specific category, to see the progress

For several items it is already possible to see the time spent in a specific category. For example, for Ideas, when you create a report you can display the column "Idea time spent in status category In Progress".

As now we have the possibility to define our own status categories, it would be great if the logic to determine the time spent in a specific category can be applied also to custom status categories.