Originally Posted by
mulcher
Andrew W mentioned two airframes would have zero benefits to subvert risk of grounding. We would need 4 or more different airframes to mitigate risk from groundings. Thus it wasn’t feasible. The added cost from a second airframe was prohibitive.
Yup. Exactly what he said. I think I'll trust that guy over anyone on here that thinks it's as easy as adding a 2nd type without considering the complications.