Fully agree. Even if it's not completely soft, a 40L-ish travel backpack is just about perfect for most trips unless you just physically can't carry. I do have

Fully agree. Even if it's not completely soft, a 40L-ish travel backpack is just about perfect for most trips unless you just physically can't carry. I do have a larger travel pack and sometimes favor a slightly larger wheeled pack. But even though it's a bit heavy for any really long schlepping, it's lighter than the wheeled frame and is a lot easier to deal with on trains etc.