Did Satoshi make any kind of “farewell speech” before leaving?
As I understand it, Satoshi has not posted anything online for many years now. Exactly when the last time was is apparently fuzzy. Did he really just stop posting/discussing one day? It seems like such an odd behaviour if it really was like that.
If I check the last posts on Bitcointalk: https://bitcointalk.org/index.php?action=profile;u=3;sa=showPosts, he/she/they posted something about Wikileaks accepting Bitcoin donations and only one post after this about DoS:
It would have been nice to get this attention in any other context. WikiLeaks has kicked the hornet's nest, and the swarm is headed towards us. -Satoshi (December 11, 2010, 11:39:16 PM)
Maybe he/she/they were not comfortable continuing to post after this event because of privacy, OPSEC etc. We can only speculate and would never know the exact reason for being inactive. Some people also think being inactive after few days was always the plan assuming Satoshi had studied social economics & psychology in late 90s.