I started a new thread to talk about Swift for TensorFlow, so it is logical to move this discussion over there (allowing this one to remain true to its more general subject line).
That said, there is no reason or need to speculate about forks. No one involved in Swift for TensorFlow is interested in such a thing, we are very much interested in working with the Swift community to make things fit. I realize that there is possibly no way for my words to satisfy whatever concerns you have, but there is also no need to speculate about something when you don't know what changes are involved :-)
-Chris