a two-level type system was an explicit design decision
of the 822ext working group. this decision was made for good and valid
reasons, and nothing which has happened since has demonstrated that
such a decision was shortsighted. in particular:
nobody has demonstrated a need for an extra level of type classification.
nobody has demonstrated a need for an extra level of fallback behavior.
I thought this whole discussion was based on a perceived need for
extra levels of type classification and fallback.
Steven Pemberton