I don’t know why Apple limit the number of timers in this way, but I do know that a single hardwire timer is sufficient to manage thousands of software timers.

I don’t know why Apple limit the number of timers in this way, but I do know that a single hardwire timer is sufficient to manage thousands of software timers. Look for George Varghese’s work on Timer Wheels if you’re interested. Commonly used in hardware constrained embedded environments.