At this moment it looks clear to me that Apple won’t go that way. It’s enough for them to focus on inference and actual application not the heavy training part. They have been probably training models on a cluster with non Apple silicon and make them available for their chips only for inference.
Not to mention entirely outsourcing training workloads to specialist firms. Apple does a lot of secretive outsourcing of things you might think they would or should do in-house. This contrasts with Google and Meta who seem to like keeping everything in-house.
