the networking does not necessarily has to be in standard library, but there has to be some "official" package/library that handles these things on a superb level and is ready to go in an instant. for odin, there is one http server in the works, and according to bil it will be the "official" package but when you look at it, it is VERY lacking in many aspects. it's more like a guy made a library that kinda works, but it's nowhere near the expected standard and performance one expects.
That's probably relative to the few contributors on the project. Until recently, was even worse, as was mainly a one-man show. This can be seen by checking the contribution history.