Ok, as I learn on how Android works in this respect, I think I understand the following:

- My Android device - I would guess like every other Android device - stores all new Apps in /data, which is Partition 6 above, limited to 1GB.

- To address the storage space limit, I have now created a ext4, 15GB partition in my 32GB microSD card, so that by using software such as Link2SD, I can move my stuff currently on /data in the newly created 15GB ext4 partition, AND create symblic links into /data so that the OS finds it as expected.

This is what everyone seems to be indicating as the way to go.

This is clear and known.

My question: why can't I simply place /data onto the 15GB ext4 partition and avoid the symbolic link? What is making it impossible, practically?
I would imagine some scripted process to go like this: mount the 15GB partition as /datatemp, make a 1:1 copy of /data to /data temp, unmount both, mount what formerly was /datatemp as /data. No? Why not?


Thank you in advance!