Scott,
APC would need a significant tooling change to get a solid prop that light. If they reduced blade thickness at the hub, narrowed the blades a bit more and converted to 100% carbon, 90 grams is doable. Even at 100$ it would be a bargain. Problem is that they would sell only a couple handfulls so tooling cost is possibly a big choke point.
In meantime, I am finally healthy enough to continue my R$D. Now if I can only find my mag balancer ..........fool thing disappeared.
Yeah, you are most likely correct in regards to cost being a factor, but there's no harm in hoping

. With the imminent demise of Oxai, there may very well be less GP planes available which won't help the cause either. Hopefully someone will take over and continue with GP versions.
Yep, things have a habit of disappearing even when I know where I left them
Glad you're health is returning.