That doesn't make lighting it on fire a great option.

Perhaps spending it on inference that will be obsoleted in 6 months by the next model is not a good idea either.

Edit: especially given that Apple doesn’t do b2b so all the spend would be just to make consumer products

The cash pile is gone, they have been active in share repurchase.

They still generate about ~$100 billion in free cash per year, that is plowed into the buybacks.

They could spend more cash than every other industry competitor. It's ludicrous to say that they would have to burn 10 years of cash flow on trivial (relative) investment in model development and training. That statement reflects a poor understanding of Apple's cash flow.