We have fossils of dinosaurs that existed 40,000 years after that one.

Yes, and some dinosaurs are still alive today. We call them birds. The environment of the earth was still radically altered in an instant, and our ancestors were the winners.

Those were fossils of non-avian dinosaurs.

Ok I'm really missing your point then. Can you restate it in a way that contradicts something I'm saying?

I'm saying that the current extinction event is considerably worse and faster than the Cretaceous-Paleogene one.

Based on the prediction that some significant percentage of life will be extinct decades from now?

I don't see how anything that has happened yet in our timeline compares in any way to a massive asteroid impact.

Phew, you made me feel more optimistic about the world. Our current extinction event is comparable to one where a literal huge asteroid hit the planet :-)))

I mean, I do actually find solace in the fact that extinction events in general can create new conditions for new forms of life, and that one in particular paved the way for mammals.

But, my comment was only responding to the assertion that "This is the first time extinctions are happening faster than evolution."