So what is the status of Crystal multi-core now? My understanding was that Crystal enables Go-like concurrency (green threads communicating over channels) except they call "go" "spawn". Except it was still single-core and they were working on multi-core?

From what I've seen I really like Crystal. It has good ideas and they're working on a dang REPL! I'd like if it took over some of Go's share, and I'd like to not have to say "but they're still working on multi-core".