>>45
R7RS is spartan but there are a few excellent design decisions that I wish were in R6RS as well. For instance, it has a well-defined cond-expand that is much better than SRFI-0. Not all R6RS implementations implement SRFI-0 anyway (Chez, for instance) so you need to resort to the de facto file suffix trick (eg foo.guile.scm, foo.sagittarius.scm, foo.larceny.scm for a foo library). Stuff like this gives me faith about R7RS Large being built on a strong foundation.