I've been writing Swift since day 0 of its announcement - the migration issues aren't that big of a deal even for 10k lines of code, especially if you did it at

I've been writing Swift since day 0 of its announcement - the migration issues aren't that big of a deal even for 10k lines of code, especially if you did it at each step. Sure it isn't fun, but everyone knew it was a early/beta language. After 3.x, their won't be huge breaking changes thankfully. Personally, only issue that bugged me was slower compilation time. About significant investment, this is just how Apple is. They don't stop the train for anyone, it's get on or off. Same goes for SDK you compile against, certain features you must bake in etc. Objective-C is 33 years old, I don't know for sure but I bet it wasn't that stable at the start!