Does anyone use period types for a tracker program?

Hi all,
if you are using the period types for tracker programs, we are interested in hearing from you here in the product management team. We are looking at this feature now and how to best facilitate the use cases that exists in the field.
There is both a “Expiry period type” on the program, and a “Period type” for program stages which can be set independently. We are interested to hear of your usage of either of these, as we want to clean up and potentially merge these period types.

Best regards