With advancing transmission systems blurring the traces concerning convenience and involvement, the gearbox discussion continues for a good explanation. Bigger gears supply much more speed instead of torque, that is perfect for smooth  driving to the freeway.  A lot of handbook cars and trucks have four to 6 forward gears, https://israelikgdy.madmouseblog.com/14206917/considerations-to-know-about-automobile-gearbox