Even at the risk of attracting the hatred of many, I would not necessarily spend money on Cat.7 wiring. And for the following reason:
PowerLan
~ already allows transmission speeds of gross 500 Mbit/s today. Data security during transmission is also not a problem. Current systems also allow encryption. I simply assume that most builders, when patching themselves, can no longer achieve 1 GBit/s. Not to mention good 1 GBit/s routers and switches, with which such transfer rates are even possible in the first place.
The advantage:
1. 0 EUR additional costs due to wiring
2. more than sufficient for everyone who does not want to operate a data center at home
3. no installation effort. Plug into the socket, plug in the network cable, done.
I, for one, will pass on this nonsense.