[arch-general] A good time to switch to dash as /bin/sh?

[lolilolicon]

With the disclosure of the new bash bug (CVE-2014-6271, CVE-2014-7169),
it seems timely to bring this up.

Dan added dash to core/base around seven years ago [1], intending the
eventually link /bin/sh to dash instead of bash.

[1] https://mailman.archlinux.org/pipermail/arch-dev-public/2007-November/003053.html

We didn't make the switch, supposedly due to the bashism in our scripts
which had a #!/bin/sh shebang line?

Seven years passed.

Is there anything preventing us from making the switch from bash to dash
as /bin/sh now? We can then have dash provide sh instead.