It costs too much in engineer time to maintain just the hardware support to do that. This will continue to be the case and also block GNU/Linux on these devices

It costs too much in engineer time to maintain just the hardware support to do that. This will continue to be the case and also block GNU/Linux on these devices until the manufacturers start to send drivers and patches to Linux mainline before selling their devices. Unfortunately the hardware world moves so fast that the devices will be obsolete before they are supported by Linux mainline.