This, coupled with the idea that big planes simply aren't flying enough to keep the pilots certified has me concerned about commercial aviation. The scale-down

This, coupled with the idea that big planes simply aren't flying enough to keep the pilots certified has me concerned about commercial aviation. The scale-down and scale-up is incredibly costly and will result in huge write-offs of equipment that cannot be cost-effectively kept up. You can't just park these airframes and expect them to be ready when you need them.