Blower-Door-Test result (n50=1.13)

As long as I feel good with my version, I don’t care what the other person does for themselves. They are welcome to do exactly what they feel is right for themselves, as long as they don’t want to convert me.

I completely agree with that 100%. To make a decision, it is good to know the alternatives. Unfortunately, this often gets lost in "standards" if they are not questioned. I am very enthusiastic about modern technology and materials research. The exaggeration of making that the holy grail and the attempts to optimize individual measurements without context unfortunately often do not benefit the whole. That is the reason why I repeatedly question one thing or another provocatively – especially "that's how it's done," "that's the standard," or "that's more economical" considerations. By the way, I do not have a wooden toilet.

That’s true. How satisfied we will be later with [Kontrollierte-Wohnraumlüftung] will only become clear anyway; we have never had one before. But I do think that with the increasing airtightness of houses, it becomes more and more difficult to achieve air exchange for a pleasant living climate. My sister once built a house that is very airtight according to the standards of that time; she said "almost passive house," whatever that means. Without [Kontrollierte-Wohnraumlüftung] and heating with a wood-burning stove. I can’t say how it looks in their daily life, but the annual invitation to Christmas dinner at her place is always a torment. Not because she can’t cook, but as soon as 6 or more people are in the living room, you can no longer get the heat out of the place, no matter what windows you open. The thing is like a real sauna. I’m curious to see if our [Kontrollierte-Wohnraumlüftung] will be able to blow it out when multiple people are there in winter, or if it will be just as dreadful for us.

but the annual invitation to the Christmas dinner at her place is always a nightmare. Not because she can’t cook, but as soon as there are 6 or more people in the living room, you can’t get the heat out of the place, no matter which windows you open. The place is like a real sauna.
I’m curious whether our controlled residential ventilation will be able to blow that out when there are several people here in winter, or whether it will be just as terrible for us.

I think this is an isolated or extreme case, which is probably less about the lack of controlled residential ventilation. At least I am not aware of it being a general problem in houses without controlled residential ventilation.
Of course, such individual cases always exist in all sorts of areas; ultimately, one could justify every necessity from them: the air conditioning, the special cooktop or countertop, that particular heating system, or the underfloor heating as the only true room heating, etc.
As the saying goes: anything goes, but nothing is a must.
Generally, however, I observe that the more freedom and endless knowledge is available meanwhile, the more standardization or uniformity takes place instead of more individualization.
Not that I have a clever explanation/solution for that, but that is my impression.
Between the extremes of a wooden outhouse and a free-floating designer toilet, there is still a wide range of “grey,” without it having to be called backward or overly modern.
Of course, we are all also driven or heavily influenced by trends or partly artificially created standards that portray this happy-dappy life to us. All of us!
The art is probably rather to find out exactly whether one really does it for oneself alone and one’s individual well-being or whether one is being led into it.
As long as, for example, AUDI sells more cars because you hear these four specific knocking sounds in the commercial, it is at least clear to me that I am being “manipulated” without really noticing it. If that weren’t the case, the industry wouldn’t invest trillions of euros in such things to get their products to people.

You misunderstood, you are not being manipulated, the advertiser is just optimally adjusting their advertising to your needs... :P

... and to your fears
... and to your doubts
... and to your wallet

Well, that will mostly probably also be due to the fireplace ... in the passive house ... And I will never give up my controlled residential ventilation, just as little as Robo 1 and 2 (lawnmower and vacuum cleaner) ... it goes without ... went without ... but it doesn’t have to ...