The most regretted house tech, according to a recent survey, is smart lighting and video doorbells, with speakers in third place. It’s pretty obvious why: smart lighting addressed itself to the unbearable onerousness of getting off your arse and turning on a light, a problem nobody ever had, or if they did, they probably had 99 more pressing concerns. The appeal of the video doorbell was that something interesting may happen; maybe it would catch someone doing a........

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