We are planning our smart home in the single-family house

Cool feature. I agree. Cool, but no one needs it.

I would make sockets for large appliances like white goods, ovens, stoves, portafilters, refrigerators/freezers, or something like that switchable. However, then with power measurement to build some switching or monitoring functions on top of that. Furthermore, I would at most put sockets in window recesses for Christmas lights, as some have, on actuators. If I want to make something switchable somewhere, I use a switchable Wi-Fi socket for 10 euros that I operate via the visualization, or I directly install a Wi-Fi bulb into the respective lamp.

I would make sockets for large appliances such as white goods, ovens, stoves, portafilters, refrigerators/freezers or the like switchable. However, with power measurement in order to build some switching or monitoring functions on it. Furthermore, I would at most put sockets in window reveals for Christmas lights, as some have, on actuators. If I want to make something switchable somewhere, a switchable WLAN socket for 10 euros comes into play, which I operate via the visualization or I install a WLAN bulb directly in the respective lamp.

What about all the indirect lighting in the living room, hallway, bedside table, etc.? Wouldn't WLAN sockets contradict the principle of KNX, which fully relies on wiring and reliability?

I think you first need to think about a lighting concept - do you want everything Dali, do you want everything KNX (do you need RGB, strips, etc.?), do you want a mixed solution, what should be dimmable, what should be switchable, etc.

I chose Hue and implement everything consistently only with Hue - mixed solutions seem somehow dumb to me. Then you don’t necessarily need to make so much switchable again. But on the other hand, you are somewhat limited in terms of lamp selection, and the control of Hue via third parties (e.g. dimming via KNX dimmer switch) is not really elegant (due to request limitations from the bridge) - if you rather want to work via touch control, then it almost feels native.

What about all the indirect lighting in the living room, hallway, bedside table, etc.?

I am only talking about rather mobile things like floor lamps or something like that here. Exactly what you plug into sockets somewhere. Whether a clip lamp on the bed with a Hue or some other bulb endangers the KNX concept, I dare to doubt. Permanently installed lights are, of course, connected to actuators. Whether DALI or KNX is a simple calculation. From a certain number of dimmed or tunable white fixtures on, DALI pays off, before that rather not (apart from the wiring effort if you do DALI properly). But as my predecessor already said, a lighting concept should be created here first.

If I want to make something switchable somewhere, a switchable WLAN socket for 10 euros is used, which I control via the visualization, or I directly install a WLAN bulb in the respective lamp.

Then you can also work with Shelly. Switchable and at the same time power measurement.

I would make sockets switchable for large appliances like white goods, oven, stove, espresso machine, fridge/freezer, or something like that. But with power measurement in order to build some kind of switching or monitoring functions on top of that.

Honestly - not only to you -, why do I need to have the oven etc. switchable? And what for a power measurement? I can see the consumption then, but switching and monitoring is in my opinion (also for the fridge) total nonsense. But since I like to learn, I am happy to take in real practical applications.

To be honest - not only to you -, why do I need to be able to switch the oven etc. on and off? And why measure power consumption? I can see the consumption, but switching and monitoring is, in my opinion (also with the refrigerator), total nonsense. But since I like to learn, I am happy to hear about practical applications.

I find the measurement quite interesting. For example: I leave the house and have left the stove or oven on and receive a warning or can alternatively check from afar if I forgot something. Regarding the refrigerator: mine once broke down unnoticed. I had to discard all the food from the freezer. A warning (if applicable) would also help here.