[jlokier]

On device is where you want it if it's going to analyse really private data, or something effectively your own (such as homomorphic encryption, or a link to your own computers elsewhere).

You're likely to feel so much happier, freer and easier sharing your most personal life datastream with an AI assistant, if you can be sure its most intimate analysis is just between the two of you.

It puts me in mind of the two kinds of AI in Manna: https://en.wikipedia.org/wiki/Manna_(novel)

Coincidence or not, the dystopian AIs are somewhere in the cloud and work for someone else, while the utopian AIs are intimately personal to each user and work just for the user.