Currently that's true, but we aim to have better concurrency than go at the point of 1.0. Crystal can probably also gain more architectures faster due to llvm.

Currently that's true, but we aim to have better concurrency than go at the point of 1.0. Crystal can probably also gain more architectures faster due to llvm. It's only about a week's worth of work (at most) to port Crystal to a posix target that has LLVM support.