Game Disks or Game Cartridges on Home Consoles

[Shiken]

Cartridges keep your save data off of the console, which is ideal for if you need to use a different system than what you would normally use.

Example my ex got the WiiU in the divorce because it was a gift for her. I kept my games though so no big deal, I just buy another WiiU. However my save data is gone if I don't do the transfer and hers is gone if we do. With cartridges this would not be a problem.