It is not categorically different. As I said above, green threading has advantages over OS threading, but they behave exactly the same in terms of design patte

It is not categorically different. As I said above, green threading has advantages over OS threading, but they behave exactly the same in terms of design patterns and potential bugs. This is what I was getting at when I said "not that different": compared to the difference between event-loop concurrency and threaded concurrency, M:N green threading is basically just a subcategory of threading.