Feminism is still advancing because it is positive for the top males in hierarchy (let's call them uber-alphas, I doubt any of them would waste time for sosuave) which are the richest, often white, males and their families, as they are free to do as they wish (Donald Trump being a perfect example - preaching conservative values but having several sexual mates and offspring with few of them, going against any legal or social issues connected with his way of life like a tank).
For such guys it is ok that society turned to hypergamy as they have unlimited resources to share with their close ones and offspring and religious system in USA (or any Western World country) does not support idea of having multiple wives. The idea that supports the strongest always prevails - strongest are the ones accustomed to take a lot and give sparsely - the more hypergamy prevails amongst women, the more single mothers are not frown upon and children out of wedlock are accepted, then the more power to them. Hundred years ago single mother would have very difficult life, now she can freely decide to turn ONS into baby-making project, counting for some chance of alpha taking care of the baby ("oops, sorry honey, do not know how THIS happened"). If not, then just carry on with raising alpha's child alone (salary is often enough for that), perhaps taking some beta-male for casual sex and favours/stability from time to time.
It also cuts wings for every average guy that is now not protected by social norms - it is normal that more resourceful man may freely make advances to his woman and the woman may freely decide whether to accept the advances or not. Lack of social norms protecting average working guy in this respect made the "finish/safety line" of SMV dangerously unachievable for most of men.
Therefore, even if feminism is a movement run mostly by females, it has an acceptance of top SMV men that may actually bind the reality to their purposes, not just dream about it.