These are fascinating facts. Thanks for digging this up. Does anyone know what the max rate of change around ~150m and ~500m years ago was? I reckon this information might not be available.
From the fossil record we know that we last had something similar to the current levels about 15-20 million years ago, when our ancestors were just great apes. It was indeed a few degrees warmer and the sea level was higher. https://www.sciencedaily.com/releases/2009/10/091008152242.h...
We do have very good levels from the more recent history from ice cores, which shows that the current rate of change is unequalled: https://www.climate.gov/news-features/understanding-climate/...