Vernor Vinge as much as anyone can be credited with the concept of the singularity. In his 1993 essay on it, he said he'd be surprised if it happened before 2005 or after 2030

https://edoras.sdsu.edu/~vinge/misc/singularity.html

Fwiw, that prediction was during Moore's law though. If that held until now, CPUs would run laps around what our current gpus do for LLMs.