&gt; The card&#x27;s connectors plug directly into that.<p>In the past a CPU was attached to a relatively low speed bus, and the peripheral interconnects all came off some external chip. These days you&#x27;ve got PCIe coming off the CPU package and memory clocks in the GHz range, so the mechanical aspects of this become massively more inconvenient. Even ignoring that, once you&#x27;ve got storage and CPU on the card, you&#x27;ve basically got a card that&#x27;s a significant proportion of the size and weight of a laptop. At which point you could just carry the laptop instead.<p>&gt; Think along the lines of the card computers that need no cooling but have good performance.<p>The attempts on that side (such as the Motorola phones that had laptop-style docks available) have been complete failures.<p>&gt; I promise you that in physical you&#x27;ll find the more convenient versions will usually get you screwed<p>And a solution that&#x27;s excessively inconvenient will just be ignored.