I have mixed feelings about this. Yeah, it would be nice to know that thylacines are again roaming the wilder parts of Tasmania, Carolina parakeets flying about the swamps of the American South, passenger pigeons flocking in the Eastern USA, etc.
However, with some of the others, what do you do with them? For instance, the saber-tooth cat (smilodon fatalis) is sometimes mentioned as a candidate. While it would be interesting to see how it's coat is marked, what do you do with it afterward besides sticking it in a zoo as a curiosity?
Moreover, when it comes to re-introducing recently extinct species in the wild, could the cloned animals cope? For example, it has sometimes been suggested that captive-bred tigers could be re-introduced into wild areas that could support them, yet experiments have shown that captive-bred tigers are very inefficient killers. They just don't have the killing skills that wild tigers learn as cubs from their mothers. (This is probably what saved Roy Horn when the tiger Montecore jumped him. When Horn stumbled, it triggered the cat's prey instinct, but when it grabbed him, it just didn't know how to finish the job.)
If re-creating a sabretooth could be done for not too much money, then I'd probably be for it, just to see a real, live one. Otherwise, I would rather see the resources but into preserving the dwindling populations of our existing big cats, just to cite one example,
Anyway, does anybody else have any thoughts about this business?