Andy Wingo writes:
The question that the Scheme community should ask itself, though, is "does the world need a better R5RS?" After all, R5RS was released 15 years ago, and in many ways that focus has limited the results of WG1. The intervening years have taught us much about the interactions of modules with macros, about delimited continuations, about concurrency, and about how concurrency affects our choice of basic data structures. In this regard there are still many steps to make for Scheme to make.