> “Manual” async programming with callback functions/closures is not the only way to do cooperative multi-tasking. Google’s Go language takes another approach k

> “Manual” async programming with callback functions/closures is not the only way to do cooperative multi-tasking. Google’s Go language takes another approach known as “green threads”, or “user level” threads (vs operating system / kernel managed threads). Isn't Go preemptive multi-tasking instead of cooperative multi-tasking?