Yes, 30s upward seems to peak "Xilf" age for the decade below them. Women in polyamorous-spaces are very pursued and, compared to mono-spaces, the men in it are much more likely to be knowledgeable on relationship-health. There is also more emotional intelligence, and tools and systems for working through it (they virtually all work in monogamous relationships too, but because there are more moving parts people seem to care more for preventative measures than just being reactionary).