For me, it&#x27;s simply because it&#x27;s been incredibly easy to swap out broken parts as they come and go. I don&#x27;t have extreme performance needs with my main machine, and various spare computer parts always find their way into my life, so it&#x27;s been very cheap to maintain from the beginning, and I don&#x27;t have worries about running it into the ground.<p>Laptops and other portables are harder in this regard, especially regarding batteries and intense usage. Other then that, I really don&#x27;t see how adding keyboard&#x2F;mouse&#x2F;screens couldn&#x27;t do the same thing though really. In fact my plan is to masquerade a laptop as my main desktop computer to save space and use less electricity. It will have no other purpose then to be my &quot;desktop&quot; as I have another laptop better suited for portability and battery life. Built-in power backup for my main rig is a plus though!