I highly doubt that any country would use a nuke again. We all know the outcome of a nuclear explosion and I would be willing to bet that those in power are smart enough to know how tegu would be treated if they ever did use a nuke. The idea of a country using nukes is a little boys dream of power and a nationalist mentality. Politically, nukes are a bad idea. If someone in power knew they would loose it all with a nuke, they wouldn't risk it. Especially not America.
This is why nukes will be used and also why they will not be used. There will never be a conventional war between developed nations ever again, because a nation on the verge of losing a conventional war would always nuke the attacking country.
If NATO attacked Russia right now, Russia would attempt to nuke both the EU and US, because Russia would be well aware it cannot win a conventional war with NATO. The choices are "Russia loses with a bang" or "Russia loses." It isn't hard to know which one a country as insane as Russia will choose.
Not really. We're replacing our entire Hornet and Super Hornet fleet with F-35's. So any conflict in which the RAAF fights will be fought with F-35's.
I also disagree with there not being another war between major powers. Such a war is unlikely, but not impossible. I don't think nuclear weapons prevent the chance of a conflict, they're more of a "we have ours so they don't use theirs thing"; they only exist to prevent their use.
Nuclear weapons prevent your country from ever losing a war ever again. "Oh, you are defeating our nation and crumbling our power? Nuke."