I'm thinking about buying Super Mario Maker, but am worried about what will become of the game some years from now, when Nintendo shut down its servers. Sure, we will still be able to create new courses and enjoy them, but we may not be able to play another person's courses anymore and true gems of level design will be lost forever.
Is it possible to download courses to the Wii U's HD or even an external one, so they can be played offline? In case positive, is there a limit to how many you can download?
For that matter, is it possible to share a level with someone else without internet? E.g. via a SD card or password that recreates the course.