Hi Keith,

I plan to try and put together an article on the differences in time, but to be honest need to spend more time on RealityKit and its cousin ARKit to do it justice.

In the meantime I honestly don't think SceneKit is going to die in the next few years, besides which I suspect the many of the team members working on ARKit/RealityKIt were in the SceneKit team, so the API and the source are very similar.