In the original, of course, the replicants lifespan is quite limited. But we meet replicants in the sequel who are (at least) twenty some odd years old, and possibly older. In particular,
Sapper seems to be in his late forties - Dave Batista, who plays him is 48.
Presumably, the lifespan limit was engineered out of the replicants,
beginning with Rachel.
So were these replicants simply created around the same time, in their mid-twenties?