Which communication lines should be provided during renovation?

Shooting sparrows with cannons?

It was clear that such a statement had to come. Following that argument, you could still install Cat.5 now.

As I already wrote: with all the infrastructure installed flush in the wall, I choose the currently best option because I don’t want to change anything there anymore. And it’s less about 10 Gbit/s vs 40 Gbit/s for me, but rather that a Cat.8 cable is even more robust against interference than a Cat.7 cable.

The network infrastructure is important to me, and I don’t want to save a few hundred euros on exactly this item when renovating a house that will cost me over 100k in total.

Cat.8 cables are even more robust against interference than Cat.7 cables.

These things are not even installed as standard in the commercial sector, where I could still understand the argument of robustness, but are still exotic (at least I haven't seen them in any technical specifications for office buildings in the last two years). Of course, you can get the cables, but you will never need them.

I am not surprised that you haven’t seen a tender for this in recent years, because the standard hasn’t existed for that long either.

What I will never understand in these discussions is contained in your last sentence. Why do you project your needs onto others? Do you know the future better? Do you have numbers, data, facts that could somehow support your statement?

However, I will no longer participate in the discussion about the "Sinnhaftigkeit".

But I will no longer participate in the discussion about the "meaningfulness."

Me neither. Everyone should decide for themselves.

Do you have numbers, data, facts that could somehow support your statement?

Only the conversations with my professional customers, who already consider Cat 7 as overdimensioned for 99.9% of all private households. You can also have 500 horsepower in your car - but you don't need it to get from A to B.

I wouldn't install coaxial cables anymore, only where they are currently really used: in the living room at the TV. And if you already have IPTV today, get rid of it there as well. There's still an empty conduit just in case.

By the way, does anyone here use Sat-over-IP technology (SAT>IP) and would like to share their experiences? Does it run stable and trouble-free?

Thank you first of all for the answers. I am really very undecided. Normal TV is actually still watched here. I can even understand the telephone line. My thoughts have now progressed so far that Duplex-CAT7 and coax remain. But I must also admit that I am having more problems deciding whether to pull these into empty conduits (which then of course are no longer empty) or to install them flush-mounted, which represents quite a finality. Does anyone have experience in this area, replacing or pulling cables in corrugated pipes? SAT->IP might also be interesting to me...