To answer your question, not one size fits the entire asynchronous library. Netty and Mina may be closest to such a substance, but most projects may still contain some clean NIO / ASYNCIO solutions.
I affirm that you are on the right track. The more experience you have with low-level NIO / ASYNCIO, the more you will appreciate it and be able to get the most out of Netty with a low level of service.
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