And cloning also allows you to have another ready-to-go SD card to boot from or to clone it back to the damaged SD card.

My N8x0 can be booted from flash, mmc1, and mmc2.
mmc1 and mmc2 are almost identical. mmc2 is the default booting place. flash only has a minimum amount of apps.

So rarely I have to goto flash; only doing so if I want to clone mmc1 back to mmc2, or mmc2 to mmc1 (as a backup and ready-to-go!)