Apple generally provides us as developers plenty of notice to make updates, whether explicit or implied. There are a number of these that I have been doing slowly this year for various reasons—High Sierra, Swift 4, iPhone X layout. Starting at WWDC, we could have been updating our apps to be prepared for the iPhone X layout changes, although none of us knew exactly what to expect. All we knew was that “safe area layout guides” were a thing and we should be using them.
In my current project at my day job, we are using Firebase and ReSwift. I plan to write more about this powerful combination soon. One of the major advantages is that it allows us to easily support live reloading of concurrent editing. However, I ran into a problem in long-form text editing. It was impressive to see the text update while someone else edited the same data, but if you were also trying to type, it would get extremely frustrating.