There are many tracks to follow:
Case 1: they might edit AFS2021 to avoid confusion with MSFS2020, and keep on making a new version by year.
Case 2: they might keep on updating AFS2020 with in-app purchases like PNW, France, Japan, new planes like A330 etc.
Case 3: case 1 & 2 to the name of evolution. Because iOS devices are seriously becoming tremendously powerful, so old versions for old devices and new versions with quite a lot of a lot more for the newest devices. In-app purchases might be compatible with old devices. It’s 2 sides winner for IPACS.
Case 4: the flight scenery loading before start. I don’t feel like IPACS likes the idea. The ones who tried X-Plane know why. And what if I decided to start a flight with an empty flight plan? Because today you can make it from the MCDU.
Case 5: the scenery is loading as much as you fly ahead. This idea costs a horrific 50 years after world nuclear war scenery to Infinite Flight. And case 4 & 5 suppose a subscription that IPACS seems not to like. Thank you for that by the way.