I once tried to fix the limits of axes and buttons for my HOTAS. I don't see any headers with the constants for maximum numbers of axes and buttons in this new subsystem, it has no limits? Will it solve the problem for people with HOTAS with too many controls?
This adds a new joystick backend, implemented on top of HID and without
any host dependencies. This will be progressively implementated, and
it's not going to be usable until at least a few more patches.