I agree, it&#x27;s all been done and the concepts have not changed, so I wish the article acknowledged more of the history behind these ideas. What&#x27;s interesting to me is what _has_ changed: the gap between core memory and cpu performance has widened considerably over the decades. So maybe there is a good case these days for single address spaces to make a comeback, and we compensate for the lost protection by separating large-grained tasks&#x2F;services via hypervisors.