Hard to say. At least in the case of humans, high generational turnover might have been beneficial in our evolution from aquatic apes or whatever our ancestors

Hard to say. At least in the case of humans, high generational turnover might have been beneficial in our evolution from aquatic apes or whatever our ancestors were to modern humans. And so longevity genes were selected against. It might be the case that most species' environments are too dynamic for super longevity genes to be beneficial rather than faster population adaptation.