My issue with those is that they fail the "normal person" test. A normal person will try to turn on a lamp and it will never work because the smart plug is off. But with a smart bulb, it'll come on after they twist the stem a couple times. (And it never gets noticed! People are used to 3-way style lamp sockets needing a couple clicks to turn regular bulbs on and off, so they don't really notice that they had to double twist the stem to get the light to turn on)