This is a major post assessing the cost to climate policy of the Trump and Musk rollbacks. It's at an early stage, but I doubt the overall conclusion will change much: the good news is that we're only a little worse off.

Climate Change and the Trump Effect https://open.substack.com/pub/peterdorman/p/climate-change-and-the-trump-effect?r=b8ew&utm_campaign=post&utm_medium=web&showWelcomeOnShare=false