The data shows that educated women seek men of similar means and status (Men happily date down due to different optimizations), which are in short supply. What option women settle on because of that isn’t yet clear.
With regards to poly whatever, it’s frequently mentioned that the top 80% of women are competing for the top 20% of men on dating apps. What happens as cohorts age will be the interesting part.
If I had to wildly speculate, a whole lot of folks are going to end up unhappy, and those who can will settle for whatever partner they can find once they meet the point of emotional exhaustion (ie loneliness, etc).