Apparently this has been an issue for several years and still has not been resolved. PLEASE make it so you can update your address on a Premium Family Account without having to re-create an account. Having to make a new account, lose your username and go through some song and dance with tech support to have your playlists, etc transferred over is absolutely ludicrous. Doing a search on these forums and the internet overall reveals that I am not the only one ticked off by this issue, and that again, it has been an ongoing issue for YEARS that has continued to go unresolved and unaddressed.
SPOTIFY: Please change this - make it so you can only update your address once every 6 months or something, I don't know, just fix this. People move. Especially if you are renting, expecting someone to reside at the same address for life is ridiculous.