I've always felt that mastering CoreData's multi-threaded APIs are a trial by fire. Tutorials and recommendations only got me so far and I had to stumble my way

I've always felt that mastering CoreData's multi-threaded APIs are a trial by fire. Tutorials and recommendations only got me so far and I had to stumble my way through to truly master it. At the end of it all, I got a bigger feeling of appreciation for the complexities involved in multi-threaded synching of data and its persistence.