Well, they've had to support about 100x more devices than Apple does. Conversely, it's incredible that Apple still hasn't figured out how to get Vulkan running on their handful of supported hardware.
The difference here is that Apple doesn't want Vulkan rendering, because they have their own special graphics stack that they want everyone else to use instead. The Linux and Windows folks want good touchpad support and work is being done to improve it.
I must say that the touchpad support on Windows is pretty great if the vendor bothered to implement the right type of driver (the recent driver model, I think it's called "high precision" or something?) but many touchpad vendors don't do that and instead ship simple drivers based on their old code base and call it a day.
On the Linux side it's just a capacity problem that won't go away any time soon. This project seems to be the only group of people in the Linux community that cares enough to take the huge amount of time to re-write and re-design the software stack to accept better gestures, and even with their dedication it's been taking them a while (understandably so!).
I must say that the touchpad support on Windows is pretty great if the vendor bothered to implement the right type of driver (the recent driver model, I think it's called "high precision" or something?) but many touchpad vendors don't do that and instead ship simple drivers based on their old code base and call it a day.
On the Linux side it's just a capacity problem that won't go away any time soon. This project seems to be the only group of people in the Linux community that cares enough to take the huge amount of time to re-write and re-design the software stack to accept better gestures, and even with their dedication it's been taking them a while (understandably so!).