Has Qualcomm seen the light after working with Valve on Steam Frame? The news that Steam Frame would be running an open source Adreno GPU driver really caught me by surprise.
(And I don't think Qualcomm has seen the light - my understanding is that the Turnip drivers are purely reverse engineered.)
I hope they succeed but the last generation has only recently become mostly usable for specific distros. General support may take a while.
The stability layer also doesn't actually let you seemlessly update the kernel. Those userspace binaries are coupled to specific kernel releases, and it requires work on the vendors part to facilitate new kernel version upgrades. Maybe being upstream will force them to actually take backwards comparability with older userspace binaries more seriously though.