Home automation and open source software acceptance is a usability problem.
Example: even if your vision is 20/20, when you’re turning on a light you are a low-vision user of the device.
Light switches can be found by sweeping your hand in any direction. They’re tactile.
Hue replaces this with a flat piece of plastic with three options you can’t distinguish in the dark. It’s a remote that comes out of the wall, so you can knock it to the floor while trying to find it. Needs batteries, too.