The laptop is added weight rather than the only weight you’re carrying.

As a baseline I am lugging my laptop to and from the office via public transport 3 days per week (yay hybrid). On there trips I am carrying a backpack with lunch, water, gym gear, a few papers and the laptop.

Then there’s the 2ish business trips per month where the laptop is carried through airports and hotels, getting used in lounges and cafes. For these trips it’s in a backpack with a power adaptor, many more papers, pens etc and whatever else I need for that day on the road.

All this is giving me a bad back!