Essentially, we know how many pilots or sustainment individuals operate the fighter fleet at one time. It's quite limited because of 30 years of neglect of the Canadian Armed Forces. As a result, the ability for them to scale up the purchase of two fleets is just not possible. We were already seeing in many other areas, as with the MQ-9 UAV program and the P-8 program, real challenges for the air force's transition to the next generation, because they just don't have the crews. It is really difficult to imagine, even on the personnel side, how we could transition to a second fleet.
I will also say that, for the second option, Gripen and others.... Think about the integration challenges in a NORAD environment, the secure systems, the cryptological aspects of it, etc. This makes it really challenging. The cost of integrating that specific fighter, or even many other NATO aircraft, would make this prohibitively expensive and not add any positive capability development whatsoever.