I don't allow smart appliances or home automation in my house. And really, it's an easy choice. The cheapest stuff does not include that technology. You have to spend more to get a fridge with a screen.
Aside from the obvious privacy issues and information sharing, which all of us here are familiar with, there's another overriding reason not to have smart appliances or home automation - reliability. When you add complexity, things break more often, and costs go up. Obsolescence of your investment happens fairly quickly.
My line of work involves sometimes working inside of very high end homes and the newer ones contain every automation bell and whistle you can think of. And they break, and fail, a lot. One particular home is a brand new, probably a $25 million dollar plus creation, very modern and sleek. The entire house, HVAC, lighting, cameras, gates, door locks, etc. is controlled by a central service on a network. Things go wrong all the time. When the system goes down, nothing works. The more complexity you add to a system, the greater chance of a failure. These are people that paid a premium for these features, and I think they were sold a bill of goods.
Home automation companies market whiz-bang features to high end home builders and their customers, not letting on that A. The ecosystem of hundreds of different products they are assembling is not perfect nor trouble free, and B. Whatever they are putting in the house now will be obsolete in 5 or 10 years, and it will become more difficult to maintain over the next 10, 20, 30 years without substantial upgrades and replacements. What is state of the art now will probably be seen as fairly archaic when the house is sold again. For large homes and mansions, there is probably a middle ground somewhere that allows for some automation, but has enough manual control so that if something fails the device in question is still operable. This is not what I'm seeing in the newest systems. They are entirely reliant on a server for things as basic as turning lights on and off. Where a light switch would be, there is a keypad with five or six buttons, none of which anyone ever uses except the top button that turns the light on and off, and it's harder to find and press vs. a traditional light switch. The idea of being able to have dimming presets, etc. sounds flashy, but in reality they go largely unused. The biggest visual effect of course is when you push the button, it slowly fades the lights on. I find that annoying. I just want it on. Maybe that's just me and my old school ass that grew up with regular light switches. Being around this stuff has completely absolved me of ever wanting it in my own home, and I used to be a pretty big home automation enthusiast in the early days of Homeseer, X-10, Insteon, etc.
For a regular sized home on a regular suburban lot, there is no need for home automation. It is a solution in search of a problem that doesn't exist. If you want to change the temperature, go adjust the thermostat on the wall. If you want to turn on a light, go hit the switch. There have been plenty of examples of home automation companies going under and the network enabled features of their appliances are suddenly rendered useless. With my dumb home, the problems don't exist. I don't have to do anything, maintain anything or subscribe to anything. It's bliss.