WSGI is a standardised interface / API. Since Node already has a de-facto standard of the built in HTTP package, why would it want another standard? A built-in

WSGI is a standardised interface / API. Since Node already has a de-facto standard of the built in HTTP package, why would it want another standard? A built-in server certainly provides for better compatibility in that people are more likely to use the existing request & response objects rather than code something totally different, but performance is mostly a property of the server implementation, rather than the interface specification.