[DesertRhino]

Of course cost. But in the air it does not exceed the 15 in any way.... ever.

[Lower Deck]

Maybe not. But the CAF has been flying F-18s for decades. It’s a known platform, the people are trained for it, it makes sense to buy more instead of switching to F-15s. Especially if this turns out to be an interim solution.

[Bulwyf]

I don’t think there are any aircraft that can yet match the 15 in capability.