Earlier quoted context omitted.
Arc snarfs the string implementation from MzScheme which support Unicode in The Right Way, as code points rather than octets.
So should I infer that the only reason UTF-8 is mentioned is that the reader APIs do not let you select the codec? Or is even that provided in which case it is accurate to say that Arc supports Unicode-in-general?
I don't think anyone at this point would claim that Arc supports unicode-in-general.