It is if you're a schoolkid. The difference between a flexible 500gram backpack and 2kg hard edge backpack is massive and in fact not recommended by most health experts. Ergonomics matter.
You specifically addressed the idea of an HN poster having one, though, and compared it to your current bag.
It's a bit much for elementary school but I had a pretty big backpack by about grade 5, and my current 2kg backpack is quite comfortable.
> The difference between a flexible 500gram backpack and 2kg hard edge backpack is massive and in fact not recommended by most health experts. Ergonomics matter.
Sure, in that the vast majority of the difference is the hard edges.
Though you don't actually want much flexibility when you're putting textbooks into a backpack. You want relatively stiff padding to protect you.
That's so light, of course I can. I'm legitimately baffled by the implication that this is heavy for a backpack.