[eurleif]

Async IO is concurrency, not parallelism. And Node.JS is simply a framework for JavaScript, like Twisted is a framework for Python. If you compare a framework to a language, then of course the framework has more stuff built in; but that's hardly a fair comparison.

[frollogaston]

NodeJS is a separate runtime. It's not really the same language either since import syntax differs from web JS and the standard libs are different. Or in practical terms, you can't copy a lot of browser JS code and expect it to work in NodeJS as-is.

But that's beside the point. Performant web backends are way easier to deal with in NodeJS than in Python. I'm not comparing to Twisted because, even though it looks good, every Python backend I've ever seen was either plain Python or Django, which was also a mess compared to Express.