They said these spores are all over the galaxy, how could they all be destroyed? Also, the tardigrade is optional, Stamets said that a super computer would do. Besides, I'm sure they took a DNA sample, so they could clone a new one if something happens to Cuddles.When the spores are all used up and the mushroom creatures are all dead from overuse of the technology by Starfleet, the Grateful Dead Magic Mushroom Drive won't be available to anyone, especially Voyager.