Always interested in peoples motivations for home automation stuff, tbh I don't see the point for it in most houses - having lights that come on via movement is easily achievable with cheap, non-automated solutions, we have done it most hallways/stairs and cloakrooms for about 15 years!
If you are going for a nest alarm, that has a nightlight on it too...
Voice control for switching things on and off and dimming lights its pretty gimmicky imo, you'll end up just using the normal switches/remotes anyway.
It's really one of those things that comes into the bracket of just because you can do something, doesn't mean you should!
Have used the lutron system a few times which allows programmable lights/closes curtains/blinds/rooflights etc but that's an expensive option!