While it's easy to second guess the decisions that were made here, I have to agree that the solution obviously works fine. Since a physical connection to charge

While it's easy to second guess the decisions that were made here, I have to agree that the solution obviously works fine. Since a physical connection to charge the battery pack was designed in, it seems a shame not to utilize the physical connection for data transfer. I personally have an allergy to using wireless when a physical connection is possible, so that's a bias I bring to the table. I wonder if there's not an off-the-shelf connector that can be used to route power and USB signals which would fill the role. There's nothing saying the connector has to be small, the entire back and underside of the cartridge is available for the purpose. The original Polaroid film packs had two large pads on the bottom and the camera two long springs to connect with them to provide power from the pack to the camera. However, Polaroid didn't have to contend with ejecting the entire pack with every photo. My bias says that using wifi adds complexity, but I can see that getting the physical connector right is also not as simple as it first appears.