One of the developers used to work (maybe a lead?) on Droidian(/maybe Waydroid; I don’t remember, unfortunately) so part of the advancement probably has to do with already having familiarity of the problem-space.

Also, Purism is trying to serve up entirely libre hardware whereas FuriLabs is using Halium to simplify how well things work in the hardware.

So of course Purism is having a much harder time with things.