AI is an area where having decades of private data hosted and indexed by a third party is actually paying off with a direct return (vs just using it to surface ads). All moral qualms about FOSS and whatever else aside, asking a question in plain english and having an "AI assistant" digging through years' worth of photos, emails, events, chats, restaurant reservations and more and returning an incredibly detailed answer that no person ever could feels like the magic of tech being realized in front of our eyes.

Would I prefer this was all open technology instead? Yeah, of course. But it is abundantly clear that economic incentives don't allow open source to compete with the big players, and that's just how it is.