The flow only continues until the airline can't stage all of the current flying. As soon as they can't get enough pilots, they will stop letting them go. They are not going to allow flow when flights are cancelling due to lack of staffing. This is common sense.

Now, here's the funny part. If the 700's don't leave Envoy, then Envoy needs more pilots. If they don't hire enough new pilots, the flow will stop sooner. So, the best thing for the flow at Envoy is for the 700's to leave property. But, are the Envoy pilots smart enough to figure this out? No! They are celebrating that the 700's are going to stay on property longer. They will still go to PSA, because it makes financial sense to have all of the RJ's at one property and the EMB's at another property (after PDT is merged with Envoy when the Trash8's are all gone).

This is a prime example of why pilots are pilots, and people with real business sense are in management.