However, if twisted were it's own language, it may end up looking much like node. Twisted is just a library (a damn good one, yes), but if you were to try and transform it into the base framework for an entire ecosystem people might also rail against it from time to time, due to the async-by-default nature.

Also, to me, twisted seems like a much more high-level tool (replicating protocols over simple parallelization/concurrency), than something like gevent