Yup, I agree. When we went to Italy, we first spent a long weekend in Berlin, visiting our exchange student son. It was April, but still cool. Then, on to Siena. The first 2 days were cold, rainy and raw. Then it became beautifully sunny and 65 degrees. We rode up into the Tuscan hills on crappy mountain bikes, walked miles around town with our son who was studying in Italy, and ate in countless restaurants. Then we spent 2 days in Florence, where it was 75 degrees. When I go to Europe, I make a point of dressing like a native. No running shoes or fanny packs, or anything that brands me as a dumb tourist.
What I'm trying to say is that if I hadn't had my "big red" suitcase, I would not have been prepared for all the different weather conditions, or situations that required nicer clothes as well as casual stuff, along with my cycling clothes and shoes. Sure, we had to lug those damn things up stone steps at the Siena train station, but, we managed.