The source code of the Linux kernel portions is still a huge step in the right direction, even if it comes without detailed datasheets and and talks to propriet

The source code of the Linux kernel portions is still a huge step in the right direction, even if it comes without detailed datasheets and and talks to proprietary firmware. It still lets you continue to evolve the internal kernel interfaces without having to worry about the driver's existing ABI. It still lets you fix most security holes, or remove anti-features that rely on interaction between the firmware and userspace. Fuchsia, by means of facilitating real proprietary drivers, will take us back to the Windows era, where the OS must support 2 or 3 different driver models in parallel just to continue supporting existing hardware after it has been abandoned by the vendor (which typically means 1 or 2 years after its launch).