From: Edward Kmett <ekmett@gmail.com>

On Tue, May 3, 2011 at 3:43 PM, Yitzchak Gale <gale@sefer.org> wrote:

> I'm sure there are countless other natural examples of semigroups
> in the wild, and that the typical non-trivial ones will benefit
> from an optimized sconcat.
>

Sold! (modulo the semantic considerations above)

Somewhat academic, but would there be a case for implementing sconcat in terms of Foldable (or similar)?

John L