Good luck on deprecating Objective-C and the C++ toolchain. As an example core of Unity is written with C++ with Objective-C bindings for APIs such as Metal.

Good luck on deprecating Objective-C and the C++ toolchain. As an example core of Unity is written with C++ with Objective-C bindings for APIs such as Metal. If Apple would mandate Swift then things like Unity would just cross compile into swift, causing perf regressions for users, all for no benefit for Apple.