[bjourne]

If it is one that that should be known about Apple software by now, is that things will change from under your feet. :)

[jeremy_wiebe]

True, but given how young Swift is I'm happy they're not afraid to challenge how things work currently in order to make Swift better in the long run.

[pjmlp]

And yet only Microsoft gets criticised for doing it. :)

[breakingcups]

Microsoft is actually the king of backwards compatibility in my view, and anyone who claims otherwise should peruse Raymond Chen's blog.