...an.org/pod/Email::Address::UseXS

Email::Address::UseXS - ensure that any code uses Email::Address::XS instead of Email::Address
To use, simply add use Email::Address::UseXS; in your code before anything that tries to load in Email::Address.

Now, some people might want to keep using Email::Address ... I am not sure
how to continue to allow them to do that.

Also, perhaps we should patch the vendor code to add: use Email::Address::UseXS;
That would mean any existing user code would continue to work as expected.