We are just a few days away from the next free upgrade released by the developers Fly The Maddog X.
In P3D v4, their MD-82/83/88 is running Beta tests of Shared Cockpit features. Like the past upgrades for 2 years to add more and more features compared to the initial product, this upgrade will be free and will add even more content.
The developers are also thinking about the future, to upgrade their complex aircraft airliner for P3D v5. It will be a payware upgrade for the base pack that simulates the MD-82. The expansion MD-83/88 will be upgraded for free if you choose to move P3D to version 5.