> My theory is that most folks these days learned to type on membrane keyboards where you have to bottom out the keys (often with quite a lot of force, if the keyboard is old)

I hate this. It's uncomfortable. If you aren't old enough to have used a good laptop before laptops could be thinner than two inches, you can think of modern laptop keyboards as the 21st century equivalent of a girdle. You give up a certain amount of comfort, but hey, at least you look sexy.

I guess we won't have comfortable laptop keyboards again until the electronics and battery are small enough to fit entirely under the palm rests and trackpad.