That's a very negative way to look at it. The benefits you get are seamless integration with all the other twisted tools and a solid foundation under the relat

That's a very negative way to look at it. The benefits you get are seamless integration with all the other twisted tools and a solid foundation under the relatively new Tornado stack. And a bug in twisted will raise many more eyebrows than a bug in Tornado - hence they are more likely to be discovered by someone else before you.