There just seems to be such a lack of OS feature updates that I think it's less a matter of making them exclusive and more that they are waiting to make a big update that will coincide with the new hardware. At least, that is my hope.
So for the save data transfer, is it only between the same account? Or can you send it to another account? Before I knew to make a Guest account, I want to move a save file over, but the account is on another Switch.