We our developing a Drupal 8 Commerce website that does not need anything to do with addresses

* The products are all virtual: membership and event tickets.
* The billing is using PayPal express which takes care of billing address.

Therefore we don't want to prompt the customer to fill in an address, or store an address, or give them an "addresses" tab on their profile. Please can anyone advise how to configure this scenario?

So far we have considered:

1. Edit the commerce flow. The BillingInformation pane gets included via PaymentInformation. If we remove PaymentInformation it does suppress the prompt for address and suppress the creation of a profile, but unfortunately it seems to stop the payment step from working properly.
2. Edit the customer profile form display to disable the address field. This does suppress the prompt for an address, but we find that an empty profile is created for every order.
3. Delete the customer profile type. We didn't try it yet because it seems likely to break the site as the Commerce core code has various hard-coded references to that profile type.

As an secondary question, we'd also prefer not to enter an address for the store as it does not have a physical address. However the address seems to be mandatory and does not allow country=none. We have entered a dummy value which seems to work as so far we haven't seen it used. Can we trust the dummy address will never be used, and if so, would it be reasonable to say that the address ought to be an optional field?