Makes sense for MH for a reputationally bankrupted company.
That would be a shame for Virgin. I can't think of any of their existing routes would be popular enough to fill an A380 to be honest.
Emirates are designing their next generation first class (to be like first class carriages in trains). They wash their planes with oil they will manage fine.
Shame for CX and a huge disappointment for CX fans. Never too late to order though