That message was sent about 6 months before Hal Finney died. (Who, incidentally, lived a couple blocks away from Dorian Nakamoto.) Personally my money is that Satoshi Nakamoto = Hal Finney, and he's cryopreserved and likely to come back in a couple centuries to sit on top of a few quadrillion-dollar Bitcoin hoard.
He might be dead but someone has control of his keys & logins as they used his accounts to defend Dorian Nakamoto.
https://www.forbes.com/sites/kashmirhill/2014/03/06/bitcoin-...