fine, that's the choice of the group. No-one here should be under the
impression that scuttling Sender ID at this time will give SPF Classic any
fast track through the standards process.
That's fine. You might want to study the evolution of NNTP. There, lack of
the official IETF stamp of approval did not inhibit NNTP from evolving. If
you try to implement NNTP based only on IETF's standards-track
documentation, you won't get very far.
This may have changed recently, but this has been the case for a long time.