Swift team announces future plans on Foundation framework.
Goal of the team now is use Swift across the framework, split it into simple separate packages and unify implementations to avoid and cross-platform issues.
This would result in more predictable app behavior, more cross-platform libraries and easier support of those.
Swift Blog: The Future of Foundation
Developer:Keep an eye on Foundation framework development. Consider using new packages for cross-platform developments.
QA engineer:Business as usual.
PM/DM:Business as usual.