device , system , and method of flexible hardware connectivity . for example , a printed circuit board system includes : a rigid platform having embedded therein at least one programmable logic device ; at least one rigid panel having embedded therein a set of connectors ; and a flexible connection to flexibly connect , at a non - straight angel , the programmable logic device to the rigid panel along a folding axis of the rigid panel and the rigid platform , wherein a density of wires of the flexible connection is greater than a density of wires entering at least one of the connectors .