I think what you’re referring to the possibility of a perturbation that can result in an uncontrolled descent down the hill until it reaches another stable equilibrium (a local equilibrium in a non linear system). I am picturing a ball rolling down from a peak until it comes to rest in a valley
My question is that given the large excursion recently seen in the temperature graph, would we not expect to see large scale effects that would be visible?
The implication is that until this impact is clear enough, strong action that is usually advocated, may not be taken. For instance, the reliance on greenhouse power plants continues to increase worldwide including the US. While renewables have made progress, there is no clear path to net zero over the next decade. So the question remains on the predictions from the models, vs tangible evidence.