[StrictDabbler]

Yes, and the technologies involved in attempting de-extinction are also useful in preserving existing species.

A species that has dwindled to about ten living individuals has a shallow gene pool.

Bringing in genes from recently deceased or preserved specimens could help deepen that pool.

It has happened that only one female of a species was known to be alive. The ability to put together a viable egg for her to bring to term would be the difference between extinction and survival.

We're also awfully mammal-centric. Frogs have already been de-extincted. The gastric-brooding frog was resurrected in 2013.

Compared to mammals it is relatively easy to transfer DNA around between the eggs of related oviparous species and there's no real reason we can't make a large-scale DNA bank for them, protecting the endangered birds, fish, reptiles and amphibians of the world.

These technologies are all part of one tech tree.