Fridge, Light bulbs, appliances, Doorbells. I don't use any of those. I refuse to let any enter our home.

Books, the object, should not be smart either. The reader and the text itself should be the smartest parts in any book.

As for watches, I wear a mechanical watch and, no, it's not even a fancy luxury item: it's less expensive than any Apple Smart Watch by quite a margin, and I never considered purchasing a smart one. I see no use and only disadvantages in using a smart watch.

My good old mechanical watches (I own 2, one as a gift from my grandfather when I was 16 and I 'm now older than he was the day he gave it to me) do the job of telling me the time it is quite well. And they have been doing so for decades for the oldest one without ever needing an update or a new batty (just a few cleaning sessions). Nor did they suddenly became obsolete, requiring me to purchase a newer model to keep using a watch. They also do not track me and respect my privacy. And I don't have to recharge them ever, one is self rewinding and the other I just need to spend 15 seconds or so to rewind its spring every morning, just before I strap it onto my wrist right after I shower and dress.