You’re absolutely right. I wouldn’t mind seeing it explored in fiction and fantasy in particular, which seems to me like the perfect genre to explore those dynamics. The only other story I can think that does it also features a sort of throuple, though the two women have a more sisterly relationship while both are in a romantic relationship only with the male (the Honorverse series)
I hope with queerness and non-heteronormativity becoming more “mainstream” (well, talked about more openly outside of niche spaces) that we’ll start to see more of an exploration of what being poly means
I think the problem is that Pondsmith and others inspired by him still use the word “humanity” for it
In Cyberpunk RED, only implants that take you above and beyond what a human can do begin to affect your “humanity” score. Replacing a limb or getting cybereyes to allow someone blind to see doesn’t make anyone less human anymore in terms of game mechanics - you don’t get hit with a “humanity” penalty for it. If you start loading up on cyberware that begin to push you into the realm of (often violent) superhuman - implanted weapons, a reflex booster that basically makes everyone move in slow motion - that’s when the stat begins to be affected, and even then it’s meant to represent an alienation from others rather than becoming ontologically less human
It’s a sight better than Shadowrun where even an implant that lets you taste food better will materially make you impure and less able to tap into the purity of magic, but it is still problematic. I think there’s definitely a story that can be told in cyberpunk about being able to pay to become literally superhuman, and how that would inevitably cause class divide to be a literal physiological divide - imagine a world where every rich kid is literally smarter and faster and stronger than anyone else can ever hope to be unless they also paid up. The problem is most cyberpunk writers are lib as fuck and can’t even begin to think about class properly, so instead of a discussion about alienation and paying to become superhuman, we get this garbage about becoming subhuman for modifying The Divine Form