discover new things
like dance-encoded strings, bytes decoded using an incorrect encoding
intended to be transcoded into the correct encoding later, surrogates
that work perfectly until .encode(), str(bytes), APIs that disagree
with you about whether the result should be str or bytes, APIs that
return either string or bytes depending on their initializers and so
on. Unicode can still be complicated in Python 3 independent of any
judgement about whether it is worse, better, or different than Python
2.