But it has.
* I remember having major issues with printer drivers on Linux 10 years ago. Nowadays thanks to IPP support I don't need any drivers any more. I had to help my dad with installing a windows driver while on my Linux laptop it just worked.
* My Laptop from 13 years ago didn't have free network drivers. I had to jump through hoops to install them. Now they are all free.
* AMD has started maintaining really good open source driver support for their GPUs
* Even for Android there is improvement, with e.g. free Mali drivers being built. It's slow and not enough, but improvement.
I believe its meant in context of Android.
Still waiting for them to reach parity for my laptop GPU, it used to be OpenGL 4.1 with hardware video decoding, nowadays I just get OpenGL 3.3 with the open source driver, the antithesis of really good.