The more you travel the less luggage you want to take. Our world where a laptop and phone can almost do it all, combined with the cloud, is helping. But sometimes you have to bring stuff in checked suitcases.
When you do road trips, especially outside the USA, you learn that most cars don't have the trunk space of North American cars, not even close. You're lucky to get two rigid body suitcases in the typical small car, 3 needs a car with special capacity.