[eyelidlessness]

If CoffeeScript has few concurrency bugs relative to JavaScript, that’s actually quite an accomplishment. Completely barring threads, or any mechanism to achieve parallelism, JavaScript tends to deal quite a lot with concurrency.

[hjl22]

Fair! They are comparing it to Erlang and Go, which are both languages designed with concurrency as a core principle. It just seems off, I guess. I can't actually read the linked article that talks about this as it's locked behind a login wall.