Isn’t Chromium open source?

I would try it in a VM first. But maybe you are braver than I.

You made me very curious about NixOS and now I’ll have to take a closer look at it. The second to last sentence did it. Thanks

They are specific to the kernels delivered with Ubuntu because of changes introduced by Canonical in OverlayFS:

Source: Ubuntu Website

All the electronics of the Liberty Phone are made in our USA facility, and the entire phone is assembled at that same facility.

I suppose that this is the reason for the high price. It’s built all in one single factory in the US (I was too lazy to research if it’s their factory). I hope that their target groups are real and that they can afford the phone.