Would you believe someone who claimed that fairies and leprechauns were caught on video, but they are too small or too fast to be seen?
By the time of his death, Stephen Jay Gould had come full circle, in effect, returning to traditional Darwinism.
This punctuated, even saltational increase in hominid skull sizes over time continues to be recognized in the literature.
Why would Eldredge and Gould propose such a model? Because they knew the data showed that potential transitional fossils are an extreme rarity.
The fatal flaw with metaphysical vitalism was that it invariably led to circular reasoning.