Oh man, I got excited to use this with our kids, but then saw that it requires a " mobile device management (MDM) solution and Managed Apple IDs." I hope they consider the family use case in the future.
In this size class, Chromebooks and ChromeOS tablets could be a better fit.
Perhaps Samsung's tablet could be more polish, but for many use cases Chrome OS is more flexible and will "just work". And to the subject at hand, user switching is pretty decent, all the more so if you keep nothing local.