Well when I can stack my coats in a refrigerator, I'll be sure to let you know. The nice thing is that as an individual you can do everything with a screwdriver on a weekend.
Nobody said it was necessary. It's significantly more challenging to get the light to turn on based on time of day, or darkness outside, or to dim by changing color temperature without WiFi/Bluetooth/Zigbee/Thread though. Not to mention fun stuff like getting your bathroom exhaust to turn on when you enter the bathroom then off 10 minutes later.
None of this is strictly necessary, of course. But it is a lot of fun.