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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Thu, 23 Aug 2012 09:19:23 -0600
Subject: Re: Flexible string representation, unicode, typography, ...
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On Thu, Aug 23, 2012 at 9:11 AM, MRAB <python@mrabarnett.plus.com> wrote:
> Perhaps the solution should've been to just switch between 2/4 bytes instead
> of 1/2/4 bytes. :-)

Why?  You don't lose any complexity by doing that.  I can see
arguments for 1/2/4 or for just 4, but I can't see any advantage of
2/4 over either of those.