The interesting question is: Where do you draw the line? Should a HTTP server/client be in the stdlib? File access? String templating? And why not a window system, 3D API and UI wrapper?

IMHO a stdlib should mainly provide standardized interface types, but not necessarily the implementations behind those interfaces. But that's probably not a very popular opinion since it falls between the two existing options of having a very bare bones and a batteries-included stdlib ;)