Those failure rates are nonsense based on theoretical limits. In practice: a few weeks ago I resilvered a 4 disk z1 array with 8tb disks at 85% capacity in less than 24 hours. I scrub the pool every month and it didn’t seem any more taxing than a scrub.
No it was the opposite. Information laid out in his dossier continues to prove true over time as more details are released to the public. Not sure that anything has been shown to be false.
Most criticism you find is heavy on colorful language like “'fake news” and “common sense” but lacks any disproving evidence.