[zoffix222]

What would make it a first-class citizen?

Even an empty Rakudo Perl 6 program is a multi-threaded program, as the dynamic optimizer runs on a separate thread. I'd figure if that's possible, concurrency/parallelism would be quite a first-class citizen, not a best hope on top of something.

[zzzcpan]

Language support for actor model as opposed to shared memory multithreading would make concurrency a first class citizen.

[zoffix222]

Thanks.