Another advantage of a smaller wardrobe is that you have less to choose from when you are trying to pack, so it makes the process quicker and easier.
You also don't "need" as much stuff, so when going on flights you can manage with hand luggage.
I put these points to the test last week when I was packing at 1am for an early flight the next morning, and I am happy to report that I had plenty to wear, was coordinated all week and didn't get targeted on boarding to put my bag in the hold!