To be fair, the pace of source breaking changes has slowed down considerably. From Swift 1 to Swift 3 there were many breaking changes between versions, and au

To be fair, the pace of source breaking changes has slowed down considerably. From Swift 1 to Swift 3 there were many breaking changes between versions, and automated migration was very necessary. Between 3 and 4 there were some changes, and between 4 and 5 almost no source breaking changes. I think it's actually fair for a new language to take a somewhat cavalier approach to backward compatibility. I would rather not be stuck with all the naive mistakes made in the first version of a language just to avoid migration.