“AGI... diffuses throughout the economy until more than half of jobs are automated by the late 2030s. Also around the late 2030s we get Bostromian superintelligence, originally in labs but very quickly diffusing out. GDP goes vertical in the late 2030s and early 2040s, and the point of no return is sometime around then.”
Target date set to the end of the 'late 2030s' window Alexander gives for more than half of jobs being automated.