It seems we should stop development for ARKIT and start using ARCore as ARkit support is gone for Unity and there is no package available in unity assetstore and Apple wants developer to use native IOS development for AR. Theres no point developing in Unity using ARkit. Unity please help me start developing some apps using ARKit 3.
ARKit support on Unity is alive, only Unity-ARKit-Plugin is deprecated, you should use AR Foundation for full ARKit 3 support, with all the features on it. You should not care for what Apple wants, Unity is still the best platform for AR and VR, you cannot compare the power of Unity against using XCode for 3D development, it makes no sense at all. using Unity you can develop for both iOS and Android.