Members of this forum have a wide variety of standards for comfort, preparedness, and gadgeting. It's all good. Everyone finds their own compromises with respect to weight and bulk. I mailed some stuff home 5 days into my first tour. Now I'm comfortable with my choices.
In my opinion, 48 lbs. is too much only if YOU believe it's too much. I mean that seriously. If you're grinding up a long grade and you're primary thought is why in the #*&! you brought the laptop, the big pot, and the extra camera, you're carrying too much. On the other hand, if you're grinding up the same hill and you're thinking it's a good thing you only brought what you needed, you've nailed the weight compromise.