Good post Teisha,
The analogy of the motherboard as the backbone of the computer is great. It is great that manufacturers create motherboards with expansion in mind knowing that technology is every evolving. Lower level boards may have processors hard wired on the motherboard, but most boards will have chipsets that allow for possible upgrade with quicker processors and memory slots that are expandable from 8GB to 32, 64GB or greater. Also it’s worth mentioning many manufacturers today produce multi layered circuit boards. Those components that are bound together by design on motherboards would otherwise be multiple breadboards with a mass of wires running from component to component. They are very essential indeed.