Heh - going on 20+ years, my "running joke" is if the only exercise I truly get is lugging my laptop(s) around (sometimes as many as 3, depending on client-load) + "kit" (Kobo eReader, cables, powerbricks (although if it is an ongoing thing, I leave those onsite or rely on docks), powerbank, and various other gear (occasionally an active "gimbal", occasionally an HT radio + it's gear) - then at least one of them might as well be extremely heavy...

Haven't seen many "laptop-focused" backpacks that have both belts and sternum straps, would love any recommendations.