I'm trying to go back to kmail now that 4.8 is out and it's working
OK (crashes too often, segfaults in the usual suspects, nepomuk
and virtuoso).

But I wonder if this is possible?

I would like the messages to be ordered by the date of the
most recent message in a thread, not the oldest. That is,
if a new message arrives and is put in a thread, that thread
should go to the top of the list of messages (as the most
recent).

Anyone know if or how that can be done? TIA