I don't trust corporations with my data.

So a serious AI product would have to have my data (contexts, conversations) in a "secure enclave". If backed up, it needs to be encrypted.

I want a context and history that, over time, essentially knows everything about me.

It's one of the things that has been rather fascinating about Claude & Co.— he'll come back with things like, "Since you are already familiar with the ESP32…" or, "You already have a heat press from your work with dye sublimation, that will work nicely to set the inks when you screen print t-shirts…"

(Shades of "Diamond Age"… I imagine it helping me recall things when I am in my old age, notice patterns in my life I might want to break free from, etc.)

Using homomorphic encryption to protect your data is the way forward:

https://blog.google/security/how-google-is-making-private-ai...

I think you'd find https://gwern.net/guardian-angel quite interesting.

I don't mind if it's in the cloud if I consent. I always prefer a local-first option. I'm usually attracted to products that offer that. Maybe there are extra features or functionalities if my data is stored on the cloud, but any product that offers a local-first approach is always my preference.