I believe like all plants, all humans would survive just fine if they could reproduce with any other member of the human race. I believe that nurturing doesnt depend on any male (father) and female (mother) relationship. And giving the best nurturing one can do, would be an ideal. I believe that men and men or any other combination could have, love, and nurture any child just as well as current naturally birthed children. And that having full dna/blood/biological link would even increase any connection. I dont think that such technologies would eliminate foster children nor addoption. Since the demand for newlyborn children is much beyond the current supply. As for older children, such technologies may create more of a problem of finding homes so some solutions may be needed to resolve a loss of demand and over ubundant supply.
Technologically I dont know how far away we are from achieving such abilities.
And such abilities could be used for such heterosexual couples to use cells from a newly deceased husband to create a possible child to a widow wanting another child, help infertile couples have children, and maybe help with such special situations such as hysterectomy, ovarian cancer, tubes tied for birth control, or other medical conditions that disable, remove, or block reproduction.
As for the egg birth, most animals use external eggs. Fish, birds, insects, reptiles. And even plants use seeds which are external egg like, self sufficient. I could see using human eggs instead of inside a woman's womb, decreasing medical risks to a person. I think only mammals do live womb birth, besides a few exceptions. Saying that family connection would best require a woman's womb, is only true i think to a woman, that would almost selfishly want that experience for their own. Having an external egg would enable the other partner to experience guarding the egg, and caring for a prebirth child. It would also change abortion views. It would eliminate or change the right of choice since there is no longer a body/dependancy connection. Most of life uses external egg like offspring, humans would do just fine, and be more flexible.
Cloning would help in same sex, transgender, infertile, widows, medical conditions, and other limited families.
As for living forever......Oh Yeah! Though imagine the wrinkles.
I am all for pleasure sex.
I am all for separating reproduction from pleasure of sex.
I am all for everyone getting the opportunity to reproduce, "even Rebis and hir little Reeb".
I am all for everyone getting the chance if so desired to nurture a fetus and/or egg to birth.
KK