Energy wouldn't be free, it may be vastly more abundant and for practical purposes free for "consumer uses", but not exactly free in the general sense. To print

Energy wouldn't be free, it may be vastly more abundant and for practical purposes free for "consumer uses", but not exactly free in the general sense. To print you also need raw materials, some of which may be more rare but in high demand (and therefore more expensive). Lastly, there would presumably be high technological processes (like chip manufacturing) or simply huge industrial ventures ({space} ship manufacturing) which can't be readily replicated with semiportable 3d printers.