Limiting temperature change by every additional 0.1°C is still worthwhile from a human welfare perspective.

In that sense it is never to late. We can always do something to limit the damage. It’s just that it gets harder and harder and some damage becomes irreversible at a certain point.

Had we done more 25 years ago it would all have been cheaper, easier and led to less damage overall. That doesn’t mean doing something now is suddenly not worth it.

I suppose millions can die in slightly more comfort.