> R7RS top-level programs are just
> perfect to serve as scripts in the Unix sense.

It seems that way to me as well.

> Why standardizing "scripts" (commands read by load or a REPL) at all?
> The REPL is not really portable.

I guess it's nice if (load "foo.scm") and interpreting from stdin work
in a predictable manner. Though you're right that neither of those seem
preferred for real work, more for quick experiments.