@ScottPthere are couple of sources for arm chromebooks, which partially support rk3288 hardware, I think there is still to come with mainline kernel 5.x if finally it will support remaining rockchip features (like mpp etc) and stabilize panfrost driver. Others obstacles were removed, and c100 (and some other chromebooks too) can work pretty well.
I even could imagine some support for c100 from armbian - even as CSC, because most problems were resolved along with other 3288 issues on other boards. It's just the matter of finding interested people and basic testing.