[internetter]

I concur. I'm 10k LOC deep into a SwiftUI app (Absolutely no clue how much that works out to be in Objective C + UIKit equivalent code), and one of the most frustrating things (after all the stuff you can't do without a PhD in apple internals) is how piss poor Swift errors are. I've changed a line of code in one file, and then another, completely unrelated one stopped compiling. Most frequently, it's something about how checking the file took too long and it should be broken up (which you will learn, really means you have a small error somewhere in said file and swift isn't in a sharing mood)