I was a little disappointed at the write up too. They're cutting the cream with milk (typical in modern recipes) without explanation beyond what sounds like "I tossed the recipe and adopted a modern one".
There is no discussion of why the old version doesn't turn into a solid block of ice. (Fat content from using straight cream? Short chilling time?)
The interesting thing here would be the texture if you'd actually followed the recipe (after researching fat content of cream at the time).