Vehicles were just there when I started playing and I was like, why, and figured why blow coin on something that was bound to be abandoned like Tradeskilling.
Now, almost a year in, well, guess I should at least try them!
In EverQuest one of the first seemingly really off the wall things they did that I always think of when I think of vehicles is they put an arcade game, Gems, into it. It had nothing at all to do with EQ, It was just something to do to pass the time while a raid was getting put together or to curb burnout or whateveh. You just had to type /gems at the command line, in-game, to play it. Or something like this.