Talking about "smart cars" which track your every move and record everything which is said inside your car, smart appliances and smart homes are the next biggest things I think. TVs which know what you watch, doorbells which know who is visiting you and when, fridges which know what you buy, ovens which know what you cook, any audio assistant such as Alexa or Google which knows literally everything that is said inside your house, and so on. Some of these devices even boast that they will "learn your schedule/routine" automatically, as if having some anonymous AI somewhere knowing your every move inside your own home is somehow a good thing.

If this is really your thing, then are open source alternatives such as https://www.home-assistant.io/. Call me old fashioned, but I prefer to just open my door rather than answer it from my fridge (https://www.samsung.com/us/connected-living/familyhub-doorbell-bundle/).