[pizza234]

Crystal is not production ready. It doesn't even have production-ready parallelism (and there has been no discussion about it for a couple of years), so it can't be compared to Go.

I'd love to see large-scale adoption, but it's stuck in the typical vicious circle of no users <> little development.

Additionally, if they don't release parallelism support quickly, they'll be forever stuck with an ecosystem designed with the assumption that only one thread runs at a time¹. This was a deal-breaker for me, when I've evaluated it for use at my company.

¹=this is a very serious problem. Ruby has implemented parallelism (via Ractor), but the vast majority of the libraries assume a single thread running at a time; creating a project that uses parallelism will likely have many subtle bugs caused by the libraries.