I recall Rene Ritchie saying that Apple introduced a new scheduler that they have used privately since Mojave (could be related to the BGTaskScheduler, but I'm

I recall Rene Ritchie saying that Apple introduced a new scheduler that they have used privately since Mojave (could be related to the BGTaskScheduler, but I'm uncertain). I just remember thinking, oh crap, now I need to learn a new scheduler.