I don't think most buyers want cutting edge tech, or novel ideas. They want something nice to touch, or my cynically, something that photographs well.
The Lodestone is a fairly infrequent example of something that's really different from the usual cookie cutter 60-65% or TKLs. It's novel. Personally, I'm impressed. At the same time, it's high risk. It uses an untested mounting system, it might turn out to have flaws. Is it really going to be $900 or is that just a comparison to Keykult? Totally nuts if it's really going to be that much.
Looking at normal GBs, for 'normal' boards, there's also huge risk- lots of them are run by a single person rather than a team. Often without a strong track history for delivery. There are lots of instances where buys go through multi year delays, have quality issues, or don't get delivered at all.
I haven't followed them at all, by my impression from a quick scan is that Keykult has a track history for delivery, a reputation for quality. IMO that justifies some kind of premium and stands it out from most ground buys.
Personally, when I've looked at these $500 cases from individuals who are doing this as a hobby, I think a reasonable risk premium would be 30-50% for delays or non-delivery. So that $500 board is more like $660-750. Everyone asseses risk differently though.