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I think the worst thing you can say about IF is that it's not clearly superior to not IF for most stuff. In terms of it being *worse* for the items Jordan is indicating, I would have to assume that is coming from his personal experience, as the sum of literature doesn't really support any of those points to the best of my knowledge.
The data shows that people stick with it less, have worse insulin sensitivity, and BMR goes down sometimes. Since it doesn't do any better when done correctly, I think those drawbacks and the performance drop offs for many make it a worse choice for any outcome.