Reducing the number of commonly used planes from dozens to a handful is a great idea. Reducing it to one is not.
But there already are fighters that are widely used. The F16 is used by practically everybody, for example. It's a perfect backbone for a small air force, and still a very versatile fighter in a large air force. But some missions require something more specialized, and it makes sense for a large air force to have more specialized jets for those roles.
But there already are fighters that are widely used. The F16 is used by practically everybody, for example. It's a perfect backbone for a small air force, and still a very versatile fighter in a large air force. But some missions require something more specialized, and it makes sense for a large air force to have more specialized jets for those roles.