I wasn't trying to prove what would survive, merely show how resilient life can be. If a simple microbe is guaranteed to survive in hell, something more complex able to behaviourally adapt/relocate is likely to as well. The greatest danger to complex life is having nothing to feed on.

Tropical fish might have to survive in the Arctic Ocean, or grasses in the northern prairies, insects of a zillion different types and sizes. Life, uh, finds a way.

We won't kill everything. No matter what we do. Life will continue and more of it than anyone thinks will, even of the plants and animals. It is humans and most of the large animals and intolerant plants that need fear the impending Climate catastrophe.