The api surface is relatively small, but the capabilities you get from it (http serving, json parsing, crypto, in addition to table stakes like io, args, flags

The api surface is relatively small, but the capabilities you get from it (http serving, json parsing, crypto, in addition to table stakes like io, args, flags etc) are very high. Having a small api surface is why you need to use primatives so often, but the upside benefit to that is there is less domain specific knowledge, since you end up using familiar types and libraries in more of your code.