Your question "on why coroutines are better" is a ...

# coroutines

[elizarov]

Your question "on why coroutines are better" is a hard one. It is similar to a questions "why while loop is better than `goto`" or "why for loop is better that `forEach`" (or vise-versa) or any similar question about language features. There are necessarily many ways to do things in a typical language and the choice of what is better is highly domain-specific.