iCloud 2TB Family - saved me years ago when my hard drive crashed and I had accidently erased our TimeCapsule. Sharing files between Macs and PC's. Buy a new computer, log into iCloud, minutes later everything is there.
Apple Music Family - 3 adults, 3 kids, multiple devices (iPhones, Apple Watches, Echo Dots, Home Pods) road trips, everyone loves listening to music. As the kids grow their music tastes change
looking forward to trying out Apple Fitness+ when available