There are cars, Trucks, Jeeps, moter cycles and troop transports.
And, why didn't you jump for joy when these were added to the game as non-drivable vehicles? Why didn't you create an account at that time just to praise TFP, rather than create an account now to swear at them for not adding them as drivable vehicles?
I can hazard a guess. It's because those vehicles are little more than new models that did the same thing as the sedans that have been in the game forever. You loot them, you wrench them for parts, they have possibly a different amount of storage in which to put your gubs while you're looting.
If they made them
drivable vehicles, how would that be any different? You'd drive them like you drive the jeep or motorcycle, probably have a bit more storage, a bit higher fuel consumption, a bit lower top speed compared to the motorcycle.
But the basic gameplay wouldn't be affected very much, any more than it was affected when the vehicles were introduced as non-drivable. Different stats but nothing new for the game loop.
IMHO that's not even comparable to the other stuff that made it into the game. The new POIs themselves add more than that.
EDIT: I should be clear, I would also love to see drivable versions of these vehicles. It would be neat. But if that never makes it into the game, the proper response is "oh well" and a shrug.
Now if they introduced something into the game that would change the game loop, that's another story. For example, other games have vehicles that you find in the world, but they can be fixed up and driven. It would change the game loop because the early game would be the part where you are mobile and drive around the world, then when you run out of resources (like gas) you can't use them anymore, and that's the stage where you start base building. Something like that would literally be a game changer. But it's not why you came here and swore about everything.