Thank you for your elaboration.

If I understand you correctly, you either have a little boilerplate with tie

tie my $var, 'MCE::Shared', 0;
$var = 42;
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or you have a lot of boilerplate without tie

my $var = MCE::Shared->share( { module => 'My::Scalar' }, 0 );
$var->set(42)
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And underneath you have locking going on in either case. Is that a correct summary?

Please note that I really like what you have done with MCE!