Because Apple is pure Snobbery! Period! They'll never admit to be behind imagineers.
I've personally been infuriated by the absence of Send Later feature. I can't fathom that I could do it with a "stupid/inferior" Windows Phone that wasn't obscenely priced like an iPhone.
They lost their technological leadership since Steve Jobs. End of Story.
I still run f.lux even though macOS has native Night Shift. I run BetterDisplay even though I can change display settings natively. I run AppCleaner even though in theory I can uninstall an app by dragging it to the bin. I run Alfred even though Spotlight exists.
