Especially if you flying from summer in one hemisphere to winter in another one. When you are boarding plane in the country where outside temperature is +30 °C (86 °F) not many of us are thinking about what is waiting on other side of the world. Also I always expect get my luggage at final destination, but…things happens. Like traffic chaos last week in Europe. It is not much fun to face freezing temperature in just t-shirt in case your luggage got lost somewhere in transit. There are a lot of advices to travel/pack light, but in some cases it is better take a heaver carry-on bag with you and be prepared for such situations.
