Is iCloud required when you upgrade to iOS 11?

Apple certainly encourages iOS and macOS users to take advantage of its iCloud services, which vary in cost. A lot of the services rely on iCloud storage, and they’re free…until you exceed the paltry 5GB of included service, at which point you pay monthly from $1 for 50GB to $10 for 1TB.That’s not a terrible lot, but 5GB doesn’t even cover the capacity of any of the iOS devices Apple sells. Other services, like iTunes Match ($25 per month) are not quite iCloud features,