I was responding to
@N017RW effectively agreeing that the proposition often repeated by some that the contacts might fail prematurely if a battery is left installed for extended periods is unlikely to have any basis. The P4 battery connector is substantially similar to that of an ECU and other many other connectors that are left assembled for the service life of the vehicle. They don’t fail due to metal fatigue in the connectors. This is seemingly of relavence to the OP’s question.
Your suggestion that swelling of cells may prove to be an issue is worthy of consideration however a pack that swells to the extent it might prevent removal suggests it probably shouldn’t be relied on as a flight pack. One if the common causes of excessive puffing is to allow self discharge to the point the cells are probably permanently damaged.