I don't blame you for this initial reaction, which would have been mine too had I not known who the author was. I don't mean that I automatically trust anything published by the reporter who busted Theranos (and won two Pulitzers for other major investigations). But I do mean that if John Carreyrou and his editors decided to publish something this long, that means they (and they're lawyers) are willing to die on this hill, no matter how meandering the first paragraphs of his 1st-person narrative.

Since the story doesn't end with: "And then Adam Back bowed his head and said, 'You have found me, Satoshi'", I'm guessing they preferred to go for the softer "how we did this story" first-person narrative. There is no explicit smoking gun, like an official document or eyewitness who asserts Satoshi's identity. But the circumstantial and technical evidence is quite thorough, to the point where the most likeliest conclusions are:

1. Adam Back is Satoshi

2. Satoshi is someone who is either a close friend or frenemy of Back, and deliberately chose to leave a obfuscated trail that correlates with Back's persona and personal timeline.

wrt (2) that is if satoshi had the foresight btc would ever blow up in the way it did. obviously, he had some intuition, remaining anonymous, but deliberately creating a fake trail does not seem super plausible to me