Setting an expiry date for published content

Ashley - I will definitely post it as a request, but I think this is something that you should definitely consider. We create courses for clients that host the courses on their own LMS. I do not have the ability to set the expiration date that way, so I need to be able to do it in the code. Lectora and Captivate both have this feature, and I am inclined to use these products until this is a feature for Storyline (although I would like to use Storyline more), as I cannot create a great product only to give it away forever because I can't expire it when a contract is up.