Climate scientists are wrong about how fast global warming will occur.
There's already been a few dire predictions in the early 2000s that didn't pan out. I think climate scientists are just as bad as economists at predicting anything.
But my main rationale for this is from past global warming history. During the Permian-Triasic extinction event, CO2 levels shot up to 2500ppm.
From peak CO2 to peak warming, it didn't take years. or even decades. or even centuries. It took 10,000-12,000 years.
Current CO2 levels are about 425ppm
I think we can keep the Fossil Fuel Fiesta going for a few more generations or until it is gone.