Seriously, though: Controlling multiple bulbs at once is very convenient. Sometimes I sleep downstairs, sometimes upstairs. The lights I want on/off differ in both cases. So a simple routine "Sleep downstairs" and "sleep upstairs" that controls which lights should be on/off is more convenient than getting up and doing them individually. It was mere fun when I programmed it, but once I had it, it was awesome.
Also, having some lights come on at sunset was a real improvement. Gone are the days when I come home during winter to a totally dark house. Granted - you don't need Internet to achieve this.
AC compressors should not operate below 60F outside. Sometimes it's still warm when I sleep but will dip below 60 near dawn. Because of this I can't turn on my window AC all night. I have a smart switch that can handle the wattage of my AC. My next project: Turn it on when I go to sleep, and have it turn off when the outside temperature is below 60F - and turn it back on when it goes above 60F a few hours later.
Not nearly the color range (or control ability) you can achieve with something like Hue bulbs, but I've been happy with them for bed side lamps and the like.
You can also put Hue bulbs in and use something like HomeAssistant with the F.lux plugin to control the brightness + color temperature automatically throughout the day. No wall switch-based dimming, but dimmable with a phone.
I think you can do the same with Hue.
- connect wires behind light switch so bulb is always-on
- screw in smart bulb
- stick smart button on top of the hole of the old switch