Seeking out and using so called super mitochondria for this therapy could have it's own problems. If future generations only had such mitochondria they could b

Seeking out and using so called super mitochondria for this therapy could have it's own problems. If future generations only had such mitochondria they could become immune to future therapies. By selecting and actively promoting "healthy" mitochondria we could limit mitochondrial diversity which could lead to diseases which affect huge swathes of the population. Obviously we are not there yet but these are some of the dangers of applying gene therapy to broad populations.