We are 4 days and counting after a 8692 to 8895SF hardware upgrade and software upgrade to 7.2.10.
We have only had one issue with a 8648GTR not working after a firmware upgrade to dpc194 and reseat.
After replacing the board with a spare, the firmware upgrade process on the new module hung.
We had also incorporated HA-CPU, and were able to fail over to the second CPU which seemed to terminate the process on the master.
So far, we are keeping fingers and toes crossed.