At the very least, judging from the podcast interview, he has...

At the very least, judging from the podcast interview, he has seen all the examples of "what not to do", mostly provided as a free learning lessons over the years from various iterations/failures at Wiluna, and his point is correct in that the failures were not all to do with refractory ore specifically, but were a series of poor decisions about the geology, metallurgy, plant selection, mine planning failures, development timelines, capital mis-allocations, lack of focus, management incompetence/short-termism and greed, unrealistic assumptions and a bit of bad luck from the gold price thrown in for good measure.