Of the utility of all this
As you made him notice me, tanks and nukes are pretty but is not always obvious to place in a scenario.
OK, but I would make you notice that G&AE is only useful for players military, mercenary or pilot oriented.
It is true that the part on tanks is rather a general information but she/it acts as reference to create his/her/its own machines (kind AT walker or Walker scout of Star Wars) or to use him in a world to Mad Max or Because Wars. in the same way, you can create a history of the type: the thick mean recovered a tank and himself some serve to ransom some archaeological excavation researchers unless the thick mean are your players them same...
The part on planes is a must indispensable for all pilot I would not delay myself therefore.
The nuclear are hardest to to put in place, but you can serve yourselves of it to represent a world after a thermonuclear war as in Gamma World (I especially think about the radioactive zones and to their effects). Or to use him for a blackmail terrorist or to serve you of the bomb her even that broke down (cf the very good movie Black Star).
Anyway, explosives (weight, price and type) are indispensable for commandos, mercenaries or explorers.
In conclusion I would say that even though you don't use G&AE every day, it is a very useful game help. Besides, as for rules of basis of
Space Op, you don't have need all to know and all to use but to dig up to good knowledge that of which you have need to create an adventure, a country or a world. All it already reinforces the wealth of this game exemplary.Thes notes for what they are worth...
presentation 8/10
rules 8/10
clarity 7/10