Yes, and still lots more to do.
I think there are a lot of logistical, as well as other issues associated with the reintroduction of different species into the wild I remember they had a lot of issues with the Bull elephants that they were reintroducing into the Kruger National park a good few years ago, a lot of them were going renegade and ended up getting euthanised for safety concerns.
Yeah, reintroductions can be really difficult to plan for, and it's sadly a lot of things that can go wrong during the process.