Despite Apple and other corporate plans to move everything and everyone to "The Cloud", the masses are doing quite the opposite, moving everything away from the cloud and hosted resources.
There's already a growing exodus to use personally-controlled storage, cloud and other environments, or heavily encrypted storage platforms to hold their data, making apps that expect "iCloud(tm)" and other in-the-clear, branded solutions from being all but useless.
So as long as these "replacement" versions work primarily, and with full functionality without feature-reduction 100% locally and by default, then they'll be fine. If they require the iCloud/cloud to function, they're going to suffer from diminished adoption.
The same is happening with digital currency v. analog/paper currency, resulting from increased eroding confidence in the system (eg: Target failures, identity theft, and hundreds of other examples in the news, nearly weekly).
If these features aren't being demanded by users (and there's plenty of evidence they're not), then why the big push to store everything you have and own, off-premises?