Number of RJ-45 sockets "network sockets" - What makes sense?

We were also divided on this. You often read "as much network as possible," but we thought that was excessive. However, I also consider only 4 network outlets in the entire house clearly too few (barely acceptable if it's a 3-story house).

Our network setup now looks like this (I am always talking about individual outlets and not double sockets):
3 x living room
1 x dining room
1 x bedroom
2 x each children's room
2 x study

In hallways, bathrooms, and kitchen, we have foregone networking. Especially kitchen and bathroom seemed excessive to us. Even if we were to get a networked refrigerator in 15 years, for example, the data rates would likely be so low that this can easily be handled via Wi-Fi. We considered networking in the hallways but decided against it.

The existing outlets should be sufficient for our needs. If more is ever needed – which we initially do not assume – then a switch will be added, or "exceptionally" Wi-Fi will be used. There are definitely worse things.

In the end, everyone has to know what they are doing and find the right path for themselves. I suspect that with our network setup we are pretty much in the middle of the pack, considering all new builds in recent years. 4 network outlets in the entire 3-story house and 40 network outlets in a normal single-family home are certainly extremes (which, of course, can be absolutely right for the respective builder with their needs!).

Our network equipment now looks like this (I am always talking about individual ports and not double sockets):

Double sockets, mind you, are sensibly always connected with two cables, Gigabit Ethernet does not work together with cable sharing.

One more addition to my previous post regarding WLAN: air cannot be segmented. Here the whole house is a single collision domain. With cables, the performance in the home office does not collapse when the kids come home from school.

Double sockets, mind you, sensibly always wired with two cables, Gigabit Ethernet does not work with cable sharing.

I have already come across this trap several times in construction performance descriptions from GCs. I found it pretty cheeky, especially since it was inconspicuously hidden among a lot of "multimedia," "modern," and "top," to save a few euros on the cable or to have them upgraded to exorbitant prices shortly before implementation.

One double socket per room, including utility room, attic, bathrooms, hallway. Large rooms with 2 double sockets. We have now dispensed with [Sat-Verkabelung], everything goes via CAT7.

We have now given up on satellite cabling, everything goes over Cat7.

....and does it run stably? With what do you couple the signal into the IP network? Exip 414, Octopus? I have also thought about that direction before, but it seems too unreliable to me, that there wouldn’t be dropouts, etc. I think the family would find that rather uncool. Therefore also a coax cabling... doesn’t cost the earth anyway....

Ok, so I understood that 4 network sockets are not enough. However, I don’t understand why you might need sockets, for example, behind the refrigerator or in the bathroom (?!). But neither of us are techies. Still, the equipment should of course be up-to-date in any case, but also somewhat future-proof.

We will probably forego the TAE sockets. We currently still have a several years old standard/0815 analog DECT phone. It works to our satisfaction and we only want to replace it when it breaks. Can I then connect such a phone (via adapter) to the RJ-45 socket, or do we have to buy a digital IP phone?

SAT-TV: We will keep it at 2 sockets, each SAT twin.

Now to the network sockets: Our electrician is charging almost 124 euros (net) for a simple RJ-45 socket including Cat7 wiring. Proud price, in my opinion.

We will probably install a total of 6 sockets in the house (office, guest room, 2x child’s room, and hallway), including one double socket (living room). Maybe we will also replace the single sockets with double sockets, but I’m curious what the additional cost will be. We are bound to the electrician (through [GÜ]), so we really don’t have a choice...

Isn’t one double socket with "Cable Sharing" enough for normal use, or should it definitely be a double wiring? In the end, it is always said that you shouldn’t save in the wrong place, but first, every trade says that, and second, I wonder what the right place actually is...?