A few more Torx screws, and we're able to remove the diamond-cut aluminum chassis.

Why diamond-cut? Motorola needed ultimate precision when manufacturing this thin and light weight component.

How extreme are the space constraints inside a device this thin?

From the bottom to top, you can see the glass, display, motherboard, motherboard chips, and then quarter. (Quarter sold separately)

Check out how the motherboard compares to a quarter. The motherboard with ICs is thinner than 3 quarters stacked together.