I'm not who you replied to.

Banks are cracking down on PO boxes and CMRAs as the residential address for their clients. It's fine as the mailing address, but people who travel abroad full time may not have a permanent residential address.

Right now, you can choose to use a friend/family address, or you can pay a company to provide a residential address for you.

We should be able to say "I have no permanent residential address since I'm travelling, please send all mail to this CRMA.", but that isn't a supported scenario today.

This all gets complicated for full-time US travellers abroad who may spend all year outside of the country, but they still have to have domicile in some state even when they don't have a permanent address in any state.