It is very unclear if all System76 Laptops, PCs and Servers (apart from ARM ones) use coreboot, specifically the "System76 Open Firmware" Distribution.
Some sites mention "open hardware" without more details, and docs mention the open firmware, including support for disabling the Intel ME.
While Coreboot should be a big selling factor (see Novacustom or other Dasharo products) it is not clearly mentioned.
What is the reason and status here? Which machines do not have the Intel ME disabled?