what do you think is the advantage of comparing koa2 with express, and what is the practical role of koa2"s onion ring model in actual development!

advantages of koa

• abandons express"s callback writing and adopts the new features of Async to make the code look more elegant and concise;
• is a clean, naked framework that doesn"t bind any middleware. If express is big and complete, then koa is small and fine;
• has high support for stream and is more error-friendly.

Don"t talk about these mandarins, just talk about the idioms in actual development!