Originally Posted by
mrfox
The same way the notably safety minded American FAA allowed MFF with the MD10 and 11 I suppose.

I completely agree with you. I'm not holding the FAA up as a shining example of safety before profit. They were nicknamed The Tombstone Agency for a reason.
Regarding MFF or SFF - United Airlines has been told that they will now be required to maintain pilot currency across 'display types' in their 767-300, 767-400 and 757 category. They operate as one category for pilots, and previously required no special currency requirements between aircraft.