I think this is the point - each design team and company bet on what they believe their hardware is likely to need to perform. The performance vs power consumption trade off is really tricky when you have to guess what the software landscape will look like a few years out. Get it right, and you have a winner, get it slightly wrong and you either have 'poor battery life' in reviews, or you offload stuff which ideally would be running locally (which is the suggestion in this case).

I'm not sure I want LLMs on my phone anyway - the situations where you want a 'digital assistant' are generally ones where you've got connectivity, so offloading seems like a sensible fit for me. Of course i'm making that assumption and i'll probably look silly, but that's progress right?

Of more interest is the heavy lifting for image processing to make the phone camera not suck (it's all smoke and mirrors with phone cameras, and more inference on device helps).