Depends on how many lights you have, and how often you need to do it. I've installed extra wires from all light buttons so one master switch per room, not as flexible but same cost over 10 years. It saves me a ton grief every night turning off all the lamps in the apartment, some partners never learn that light switches can turn something off. The monetary savings are not enough to break even in 20 years, the time saved is priceless. ;-)

I get a lot of subjective value out of being able to adjust colour temperature, brightness, and hue.

For instance, the last hour or two of the day, I have lights in the bedroom and kitchen either dim red or off.

Being able to do the routine of "try to go to sleep, fail, tell my watch to turn the lights red, get a glass of water or a snack, turn lights off" is really nice. Even dim white light would be like splashing cold water on my face.

There are other ways to solve for this, approximately, I guess. This is simple and works, though.

I forgot one more thing I do: a redshift kind of system for the whole house. The lights dim and change their temperature from bright and blue during the day to dim and red in the evening, just like my computer and phone does.

Circadian lighting is the script and it follows the sun to make its decisions.