I would switch to fiber in a heartbeat if it was available to me. Sadly, it is not.
It is possible to change your Apple ID, although it you have any older devices, it can be a PITA (to impossible if you don't have access to the "old ID"). Newer devices can handle the change, but on an older device (I forgot which one), I couldn't re-log in to my new Apple ID, until I went and changed it back to the old ID, logged in on the old device, then logged out on that device. Went back and changed my Apple ID to the new one again, and then went back to the old device to log in with the new info.