For the very thinnest of laptops it's probably difficult without soldering the chips on board, but many users would prefer a slightly thicker laptop where you can replace the RAM, SSD etc. I have never had a laptop where the thickness has been an issue and I have done a fair share of traveling while working in sales.

It's like a thoughtless race to make the thinnest laptop as if that is something that is useful. I bit like the megapixel race a few years ago. "We do it because it's difficult, but we can" kind of thing.

And then we have the aluminum body used on higher end laptops. Is that really better than high-end well designed plastic? When using my wife's Macbook Air M1 I suffer from the razor sharp edges while typing. (Maybe not related to it's thinness or aluminum body, but a big design issue). Has anyone noticed on the Macbook Air M1 the small vibrations it causes in the hands/palms when you slide them over the palmrest ever so slightly? Extremely annoying.