Mouse is moved. Preemption happens. Hardware cursor is repositioned. The Amiga could do it in 1985. Linux has realtime scheduler classes (i.e. SCHED_FIFO and S

Mouse is moved. Preemption happens. Hardware cursor is repositioned. The Amiga could do it in 1985. Linux has realtime scheduler classes (i.e. SCHED_FIFO and SCHED_RR). These days, even PREEMPT_RT. Some Wayland composers are already leveraging hardware cursors when possible. Why is it so hard? What's stopping them from accomplishing this?