&gt; Raw materials are the real limitation. Three thousand+ years ago people where transporting tin thousands of miles because few tin mines existed.<p>I think that example demonstrates the opposite. Getting raw materials is not a problem; it&#x27;s so easy that people thousands of years ago were shipping raw materials thousands of miles when there was a need for it.<p>It&#x27;s knowing the need and having the need which is the hard part... Tons of silicon can be found on your local beach and have been forever. But we only got computers a century ago.