Elon Musk's interest in superintelligence is claimed to date back to 2014

A post argues that Musk was thinking seriously about superintelligence well before the current boom. It claims Bostrom thanked him for extensive discussions in the acknowledgments of his 2014 book “Superintelligence,” and says Musk publicly recommended the book that year while urging caution about increasingly capable AI systems. Musk reposted the claim.