> I'd say that noone is benefiting from WW3 apart from perhaps military industry.

What do you mean? If nuclear escalation happens and WW3 is triggered there is absolutely no world for the military industry to benefit from. Weapons will be required, of course, so production will continue but there would be no semblance of economy or governments as we know them now.

Nukes flying are world-ending, at least the human world and societies we currently experience. There's no profit to be made in total global mayhem.