I was looking for a course that covers compositionalLayout and DiffableDataSource, which I've only used once or twice, and RxSwift + MVVM, which I'm just getting started with and struggling to apply, and I happened to find it, so I paid in the afternoon and listened to it all night long. :D In particular, I've gotten a feel for the Input and Output types of RxSwift. There are a lot of things I'm curious about, but I'll go over them several times and try to figure them out!