Comment by Blackstone4

Crystal looks interesting although I decided to learn Golang instead. It's more mature and the WIP features described below made me cautious (i.e. what other features are immature).

Anyone know when Crystal will get concurrency-a-la-golang? i.e. running concurrent processes in parallel? At the moment I think it's still single-threaded. https://crystal-lang.org/docs/guides/concurrency.html

Still no windows support: https://github.com/crystal-lang/crystal/issues/5430