If apple didn't need constant growth it'd likely be totally fine selling devices with a 10+ year turnaround. I mean the shop on my corner has been the same for 15 years and it didn't die because of it.
2. Hardware isn't their only product.
Anyway, infinite growth is impossible, so the comparison to a local business is moot. Also, it should be legally required for Apple to make products that last 10+ years from an environmental standpoint.