Sorry about that, I'm speaking on a basis of web/mobile dev. Such as that which would cover things that are found in something like Django for example (batteries-included, security, validation etc) but with only using the std lib....and would like to know what is not included so as to have a list of things that one might need to implement on our own or use non-standard but popular well maintained packages.

I'm not saying I'd want to make the next instagram...but would like to know what the std lib can provide for us, and what it cannot in the event that someone would. Djangos approach gives developers confidence that in most cases only utilizing their resources is enough. I wouldn't want to end up using a framework for Go. But in Go, its more of, use the std lib and implement the rest on your own. But I would like to know what the rest is.