High modularity refers to when a system&#x27;s components can be cleanly separated and recombined.<p>If I were to guess, I&#x27;d say that amelius is saying that it becomes increasingly common as companies grow for them to expand into functions that were originally outside their core function. Framed this way, &quot;selling stuff online&quot; may have once set an effective upper bound on what Amazon does, but now they appear to be expanding into &quot;moving stuff from place to place.&quot;<p>This concept is related to vertical integration.