The intentional traveler packs intentionally. Can you really get by with just one bag? Many discount airlines in Europe and Asia charge extra for any luggage over 15kg.
Traveling with just one bag means you can be the last on the plane, ready as soon as boarding is completed to occupy that empty preferred seat (frequently a paid upgrade of sorts) rather than your assigned middle seat by the loo/WC.
You’ll also be the first one off the plane. The last shall be first, or something like that.
Anyway, check out this site for
tips on intentional one bag packing.