Pierpaolo Bernardi quoting Taylan Ulrich Bayırlı/Kammer:

> > Is #"foo" used by any Scheme implementation for anything?  I seem to
> > remember it is, but don't remember which implementation and for what.
>
> Racket uses this syntax for byte-strings.

I really like «this syntax», which Perpaolo proposed on the WG2
discussion list.

I don't want SRFI 135 to require an external syntax for immutable
texts, because that cannot be implemented portably and would become
a barrier to widespread use of the SRFI.  As a recommended external
syntax, however, using non-ASCII characters works just fine, and
has the advantage of being unlikely to conflict with any existing
notation.

Besides, almost all implementations of the R6RS and R7RS support
Unicode, or at least the BMP.

Will