Unfortunately, I don't have the same technical knowledge as you, so my defenses in this case are good old-fashioned staying away and listening to what the community has to say, if you find anything, please share it.

Good old-fashioned telemetry delivering everything that someone with good knowledge can triangulate. Terrible.

We recently had chatgpt data leaked in google results, it doesn't refer to private machines running their own models, but it's still worrying.

All the points raised there are very much what I observe in relation to people who make continuous use of it. Especially this one.