Hey DD,
I guess no one really thinks the MD11 is a good freighter
Seriously though, I think the phasing out of a lot of the PAX MD11's has to do with the fact that airlines these days are pretty keen on type-commonality. And with the MD not fitting with either boeing nor airbus, they are now all eligable for the freightbizz. That and the fact that the beautifull bird is pretty high maintenance makes it kinda the first one to go whenever a struggeling airline is making fleetadjustments (e.g. SR)