&gt; you&#x27;re saying modern processors can no longer be physically plugged into a motherboard<p>In a literal sense, yes - laptop parts are designed for SMT only.<p>&gt; Everything else, including cooling, could be built into laptop part<p>The point of this design is to allow users to take their state with them when they leave a hotel room without having to worry about the rest of the system being tampered with. You need the removable device to be packaged such that it&#x27;s trivially removable, fits in a pocket, and is sufficiently hard-wearing that it won&#x27;t be damaged. Your approach would require it to have a several hundred-pin connector and some means to bind into the cooling design, and that&#x27;s an incredibly non-trivial engineering problem.