What determines the price of smart home dimmers?

Hello
I have been collecting information on smart homes for some time now, I am mainly concerned with the possibility of controlling RLC lighting but with the possibility of dimming, and here is my surprise because it turns out that actuators are very expensive to be able to change the intensity of the light.

My question is what "sits" inside that it is so expensive?
I suspect that dimmers are based on mosfet circuits and maybe that is why they are so expensive, because there are many other elements, ok, but there are also, for example, such additional dimmers from f&f or for bus, which are relatively cheap, but you cannot do much with them and I would like to be able to change light intensity at a specific time and for that I need some kind of "programmer". Arduino is rather out of the question, as I do not trust it to work without problems for many years.

In dimmers with a potentiometer, there is a classic circuit based on a triac and a diac.
In the "digital" ones, there is a zero crossing detection circuit and a microcontroller controlling the triac based on the time counted down from the zero crossing.

gorylla wrote:

My question is what "sits" inside that it is so expensive ?

.
Nothing special. The microprocessor is maybe a few cents and the zero detection is 1 or 2 resistors. What you're paying for is not the cost of the electronics, it's the IP + the cost for the fab you're buying.