Greg Pierce, the developer of Drafts, Phraseology, and Terminology, has written a post with his reasons for choosing CloudKit instead of other sync providers in iOS 8:

I’m glad choosing CloudKit removes the need for me to manage servers or engage another third party service to do so, but that is not why I chose it. I’m not afraid of servers.

Why am I willing to make these trade-offs for CloudKit, despite it’s limitations? Because, ultimately, developer perspectives aside, I felt it was the right choice for my customers.

If CloudKit will work as advertised, I, as a user, can only appreciate the fact that I won’t have to create additional online accounts or worry about the privacy policy of an app I just want to try for a couple of days. I have big hopes for more apps using iCloud on iOS 8.