There is a strong desire to see if there is secret sauce in the driver that makes their cards so darn performant. Could it be applied to other video drivers?
To audit for vulnerabilities and fix them.
To allow the driver to use some kernel internals that the kernel developers keep trying to wall proprietary drivers off from.
Ideology
Community might be able to hack it to work better with Wayland, since the Wayland team has no interest in extending any kind of support to proprietary driver driving GPU’s… despite x11 working just fine forever. … see Ideology.