The main reason I believe for abstracting trucks into generic equipment was becasue almost all infantry used at least some trucks, some more than others.
German infantry divisions had trucks to move some of their heavier equipment and supplies but used allot of horse drawn carriers.
The UK had very good coverage of trucks for their division while US relied a little more on rotating trucks where needed, they still had plenty of trucks though.
The Japanese were more like German infantry but with even less trucks overall, both for organic transportation and in the supply chain.
Chinese had even less trucks than the Japanese and lacked quite allot in their supply chain as well.
In any way, trucks were so common and were present in every division in some form they you might as well abstract them away. It's not like they would be very interesting to design and you would only produce them in low numbers in comparison to how many you would use overal in all the branches of your military.
The half-truck was special in that they were almost exclusively used as either personnel carriers or fitted with support weapons, so they warrant more special attention.
I'm not sure about armoured cars though and how they will be handled, but they also blur with light armour and mechanized equipment.
German infantry divisions had trucks to move some of their heavier equipment and supplies but used allot of horse drawn carriers.
The UK had very good coverage of trucks for their division while US relied a little more on rotating trucks where needed, they still had plenty of trucks though.
The Japanese were more like German infantry but with even less trucks overall, both for organic transportation and in the supply chain.
Chinese had even less trucks than the Japanese and lacked quite allot in their supply chain as well.
In any way, trucks were so common and were present in every division in some form they you might as well abstract them away. It's not like they would be very interesting to design and you would only produce them in low numbers in comparison to how many you would use overal in all the branches of your military.
The half-truck was special in that they were almost exclusively used as either personnel carriers or fitted with support weapons, so they warrant more special attention.
I'm not sure about armoured cars though and how they will be handled, but they also blur with light armour and mechanized equipment.