The singularity made sense to me for much of my life as a basic extrapolation of our exponential technological progress. I viewed technology as the constant, the guiding force that was responsible for the vast increases in wealth, population, energy usage, and standard of living over the past 120 years in particular.
I was wrong. I was looking at things backwards. Technology was not driving these other factors, energy was. We transitioned to oil and everything boomed.
For a singularity to occur, there has to be an ever-increasing amount of energy to support it. You can do a deep dive on the future of oil, the state of the shale fields in the US, and mankind's energy situation, or I can TLDR it for you:
We're fucked. We're running out of cheap oil. We've spent decades chasing nearly-worthless solar and completely-worthless wind. Even if we got our shit together today and started deploying tech that makes sense, like gen 3/4 nuclear, that would take decades to fully roll out and it wouldn't fully fill the giant oil-shaped hole.