"It’s very useful for personal AI tools to have access to broader context from other information sources."

How? This post shows nothing of the sort.

"I’ve written before about how the endgame for AI-driven personal software isn’t more app silos, it’s small tools operating on a shared pool of context about our lives."

Yes, probably, so now is the time to resist and refuse to open ourselves up to unprecedented degrees of vulnerability towards the state and corporations. Doing it voluntarily while it is still rather cheap is a bad idea.