Comment by colonwqbang

There is just no incentive for this that I can see. Linux is an open source effort. Linus had said that he considers open source "the only right way to do software". Out of tree drivers are tolerated, but the preferred outcome is for drivers to be open sourced and merged to the main Linux tree.

The idea that Linux needs better support for out of tree drivers is like someone going to church and saying to the priest "I don't care about this Jesus stuff but can I have some free wine and cookies please".

Full disclosure my day job is to write out of tree drivers for Linux :)