Standard HN automobile analogy is the subcompact car class has always been the lightest car class on the road, although a 2020 subcompact car weighs about a thousand pounds more than a subcompact did when I was in high school. Think of a 1990 Geo Metro at 1500 pounds vs a 2500 pound contemporary Toyota Yaris. Its always been weird to me that an old girlfriend's Metro weighed 1000 pounds less than the Yaris I own today.
The average American mass has gone from perhaps 150 pounds up to 300+ pounds over the same time frame, so weirdly enough cars are getting fat slower than humans on a percentage basis, LOL. Cars (AND RISC CPUs) don't run on corn syrup, I suppose.