Thanks in advance for the help.
Is there a way to make a product unavailable (disabled) at a future date and time?
I have seen the "Avail since", but that sets when to make the product available.
Not out of the box. Would either require custom development to add that field to the product and then hooks to prevent the product from showing if outside the parameters.
An alternative might be (if you can identify by some attribute) to change the status of a product to hidden if your_condition is met and the time from creation to now exceeds your limit.