@FuzboleroXV I think that is primarily about moving your identity _between_ accounts and corresponding hosts/providers. Being able to access several "nomadic identities" via one account is a byproduct for me, not so important.
Main point here though is separation between a User (person or organization...), an Account and the "identity" (called an Actor in ).

@tom79 @danie10 @dansup @ConnyDuck @Gargron