In the 7th movie part 2 (I suppose in the books also) Voldemort "killed" Harry which lead to destroying one of the Horcruxes that was inside Harry. Harry survived the killing curse and the battle continued with Voldemort dying.
Now let's say Voldemort had succeeded in killing Harry and that lead to ending the war and Voldemort prevailing. Now the remaining Horcrux is Voldemorts snake. Snakes have a finite lifespan.
Or let's say Neville killed Nagini after Harry's death and then Voldemort and the Death Eaters destroy everything and they prevail. The last Horcrux is also destroyed but there is no one to kill Voldemort.
Voldemort prevails but all the Horcruxes are destroyed. What would happen then? Would Voldemort age and die as well?
So basically, in many possible cases Voldemorts horcruxes could be destroyed while he won the war. What would happen then? He stayes alive and ages? Does he create new ones?(Does he have any soul left to do so?) or is he unkillable with time and only with magic?