I've learned so much by lurking on the Swift standard library team's proposals, but digging around the std lib is something I rarely do. Were I really learn th

I've learned so much by lurking on the Swift standard library team's proposals, but digging around the std lib is something I rarely do. Were I really learn the most is from other Swift projects developed by many std lib authors like the Swift Argument Parser, Algorithms or Collections projects. I find these useful because it gets me practical pro-tips and I get to see std lib in practice without needing to know the nitty nitty gritty stuff. So that's somewhere in between a std lib and a "successful project" on GitHub I guess.