re: #787 Salamantis

When the environment changes, either mutations that allow their hosts to survive and reproduce in the new environment occur, or they don’t. If such beneficial mutations do occur, they become the new baseline, and the species evolves. If they don’t occur, the species goes extinct.

I think that is a bit too narrow an explanation. If the species doesn’t start randomly mutating until after the environment changes it will be too late. Seems more likely to me that an environment change favors some of the existing mutations over the others.