PSA: I just spent two weeks in Lisbon with a regular backpack and a proper travel pack. The difference is real.
I always used a normal 25L daypack for my gear, thinking it was fine. For this trip, I borrowed a friend's 35L travel-specific pack with a laptop sleeve that opens flat like a suitcase. The first big win was at airport security. I could open the whole main part in one go without pulling everything out, which saved me at least 10 minutes of frantic digging each time. The second was organization. Having a separate, padded slot for my work laptop meant I wasn't cramming it on top of my clothes and charger. After three days of moving between cafes, my back felt way better because the weight was spread out. The old pack just dumped everything in a heap. Has anyone else made a switch like this and found a specific feature that became a game changer?