I really like crystal (coming from ruby 10 years ago) and I still check it from time to time, but the number one showstopper for me using it more is that static linking is not possible like in Go or Rust.

Just compile a binary from my Mac and send it over to peers or compile it within a Github Action/scp it to a plain new linux server/run it - a comfort I am not willing to give up.

(No, docker stuff doesn't cut it)