It’s possible, given the age of the model, the diminishing reserve of parts in the Arizona boneyard (and thus quality denigration of the remaining parts, given ‘save-the-worst-for-last’), the no-recovery design flaw that likely extinguished the center engine at v2 after the left engine flipped over the wing and ignited the remaining left-wing infrastructure, that another MD-11 or MD-10 will ever fly again.
I agree
They were already being phased out for the reasons you specified, plus the fact that they’re less efficient. There’s a ton of 757’s and 767’s out there that are leaving passenger service and are being converted to freighters. Even with the conversion costs, they’re relatively cheap. And they’re more efficient than the MD-11.
CC