To the first question you asked, certainly two smaller fleets can be considered, but when you get to two smaller fleets, you're not just talking about having dedicated, less capable fighters, whatever you want to call them, for domestic roles versus those you would deploy overseas. You're also talking about long, extensive support lines, logistic lines, and training lines, which have to be in place to support different planes and different training requirements. All this in fact adds greater money to the cost. If you look at the process, it's something the active community, to my knowledge, hasn't really looked at closely.
By the 1980s and into the early the 1990s, there was a conscious decision on the part of all of the major western actors when it came to aerospace capabilities that the solution to the problem, given advancing technologies, was to develop multi-role platforms, to eliminate specialized platforms and move them all into one platform capable of doing everything. This has been the logic that has been driven by technology and costs, and shrinking—relative to constraints—defence budgets.
That's where this idea of having a single platform that can do everything came from. Its fundamental idea remains, which is a fundamental military idea that the combat is what we're looking for, and it cannot perform the rest of the roles. I'm not sure if I would agree with you that the F-35 is not optimal. It can certainly do the air sovereignty role. I'm not concerned, given my knowledge of the existing forward operating locations.
The engine question is an interesting question. It comes back to the reason we bought the F-18, or why the military tried to rationalize the F-18. I don't think that's a major problem, but an engineer would have to tell you the increased probability of losing one engine of an F-35 in the Arctic.
The key has been this notion that you don't want to dedicate separate platforms because of the cost of all of them. It's a cost-driven thing that leads you to buy the more expensive, advanced ones to do all of the roles, rather than go down to two or three fleets. National Defence hasn't been consistent there, but that has been the logic for a long time.
Concerning other air capabilities that are less expensive, I'm not convinced at the end of the day when you start talking about expenses how much they would end up being less expensive. I think you have to be very careful. People pull numbers out of production line hats. This is what the per unit cost is. Companies competing with each other are happy to tell you what the per unit cost will look like before you start to enter into the production line. It depends where the production line is. It depends what unique demands you want. To my knowledge, any of the other options, except for the Super Hornet, don't have two engines. They are all one-engine planes, if my memory serves me correctly. That doesn't fix anything. Above all, they are less capable. I think you're mistaken to think this is just stealth as the unique capability. There are a lot more advanced capabilities on this plane that do not exist on the existing previous generation platforms that you cannot ignore.