I've come to respect highly the "crowd-sourced development" phenomenon of a massive worldwide open community all working to improve a single code base. I have s

I've come to respect highly the "crowd-sourced development" phenomenon of a massive worldwide open community all working to improve a single code base. I have seen the resounding effects of this in other languages. Apple would be silly to assume that its vast wealth could allow an internal-only Swift evolution to compete with the progress of masses. I hope they do open it up for PRs from anyone (with no doubt a simple contributor agreement in place), and a good well-oiled machinery for seriously looking at all community code. That said, some things are fundamental to the language and its architecture, and those are the things Apple is developing internally before its open-sourcing. So it is possible the most important stuff will not be getting help from the masses.