The article is comparing systems from the same or close time periods. To merely compare modern systems with systems from 30+ years ago ignores what happened in those 30 years, which is why your comment says so little.
The point of the article, I believe, is that the current set of principles underlying modern systems are not necessarily sacred and immutable. It does not follow that applying differing principles to today’s ecosystems, where current principles have metastasized, would be easy or even necessarily achievable.