[somat]

I am halfway convinced that the singularity has already occurred and has been ongoing from the 1700's* however, being carried along with it, you can't see it directly, you can only dimly sense it's tidal pull.

It is like a black hole. how long does it take to fall into a black hole? the answer is a surprising "just about forever" due to time itself dilating as you approach the center.

* think about it, mankind had been trundling about with effectively the same economy for many thousands of years then at some point about three hundred years ago it went exponential and has not slowed down.