Vendors open-sourcing a bunch of code isn’t enough, if that code remains under the de-facto control of the vendor. It needs to be possible for a community to influence its development direction, rather than passively waiting for the next code drop from the vendor, according to Dave Airlie <https://www.theregister.com/2020/11/12/intel_igc_mesa/>. He says: “A warning then to anyone wishing for more vendor code sharing between OSes it generally doesn't end with Linux being better off, it ends up with Linux being more fragmented, harder to support and in the long run unsustainable.”