Crystal will eventually have go-style parallelism as well as go-style concurrency. It's a hard thing to implement, and we don't have the resources of google (in fact we have very little resources at all) so it's taking time. Until 3 weeks ago, nobody at all was working full-time on crystal, it was entirely a spare-time project, so progress is slow, i'm incredibly proud of what we've managed to achieve so far and looking forward to more in the future.

Really, the best way to help the language is to donate: https://salt.bountysource.com/teams/crystal-lang