Prior to my MacBooks, my work laptop was an Alienware M15x. It weighed about 11 pounds which I carried around the world and yes, that got to be quite heavy (I was done carrying it around about an hour into my first trip with it). By comparison, the 2013 13" MBA weighed in at 2.96 lbs (1.35 kg), while the 2019 15" MBP weighs in at 4.02 pounds (1.83 kg) and the 13" at 3.02 pounds (1.37 kg). My Air was a late 2011 11" MBA that weighed in at 2.38 pounds (1.08 kg).

People (the usuals) made the usual comments about "the cult of Mac" and "fanbois" and such but that is what they have to do to justify replacing a laptop every couple years because it becomes so horribly out of date, or just falls apart because it's made cheaply. I averaged a new Windows laptop about every 2 years, myself, while I've owned 2 Macs in the last 11 years, a 2011 MBA and a 2019 MBP, the MBA is still in use elsewhere in my family, albeit on it's second battery, and the MBP will probably viable untl after 2030 at least.

That said, I'll probably replace it next year when the M2 MBPs come out because the M1s are quite a performance improvement over the Intel MBPs and I could justify an early replacement for that much of a performance bump.