I am surprised that someone has not thought to use readily available AI apps like EmmaIdentity (or something newer), to compared Satoshi's large amount of emails to other early Bitcoin advocates discussions to find out Satoshi's identity. I would think this would now be quite simple and fast to do.
There have been all sorts of linguistical analysis comparisons done over the years. For example, this is a
thesis dissertation that was posted in the
BSV scam thread that compares Satoshi's writings to those by Craig Wright, Gavin Andresen, Hal Finney, Adam Back, Mike Hearn, and Nick Szabo. Spoiler alert: the only thing it definitively concluded was that Wright is farther away from being Satoshi than any of the others.