> That said, I built up an ideology that any automation added should never replace physical items. All automation should have physical kill switches. Any occupants of the home should have appropriate access to things that you would normally give them physical access to.

I call this the grandma test. Can grandma come over to my place and still operate everything she needs without a CompSci degree.

It is definitely possible to have a very smart home but still have physical fallbacks that cater for most visitors.