Yeah, it seems like mobile oses are about as common as Linux distros in 1995. Sailfish, Maru, lineage, among the two you mention. If you have a nexus 5 or one plus one, you're in luck.

I recently tried lineage, ubports and plasma, and though I liked ubports, lineage was a breath of fresh air. Selinux, opengapps, regular privacy notifications, twrp, and privacy and security seem to have not taken a back seat in general. Sign me up.

If there hadn't been contracts 10yrs ago, I probably would have gotten an openmoko. Wanted one badly. If lineage, ubports, and plasma among others can keep developing alternatives to stock android, no reason to see why at least some or all hardware doesn't follow. It's taken AMD the better part of 10 years to have open source drivers that are as good as their closed source drivers on almost all of their GPUs if I'm not mistaken.