More helpful things metaclasses can do

• Clone an object

my $instance = Some::Class->new;
my $copy     = $instance->meta->clone_object($instance);

• Add methods to a single instance

my $instance = Some::Class->new;
my $new_class = $instance->meta->create_anon_class(
   superclasses => 'Some::Class',
);

$new_class->add_method( foo => sub { 'it worked' } );
$new_class->rebless_instance($instance);

# also possible
my $new_instance = $new_class->name->new( ... );

• Add roles to a single instance

my $foo = Some::Class->new;
$foo->does('Soem::Role'); # false
Some::Role->meta->apply($foo);
$foo->does('Some::Role'); # true