That seems kind of like table stakes to me. While individual apps could always include their own model (you can do it today) having a highly optimized pre-train

That seems kind of like table stakes to me. While individual apps could always include their own model (you can do it today) having a highly optimized pre-trained one in shared storage would certainly be a big benefit compared to everyone trying to stick their own copy of a similar five gig model in their app. Plus it would mean Apple could improve it with OS updates without app makers having to update and ship app updates every single time.