Mineral plaster instead of textured wallpaper?

Many thanks for your posts!
Regarding the paste: yes, as long as it only contains methylcellulose, it is a "neutral" product. But if extra/special paste is used, there are synthetic resins involved, which I prefer to avoid on my wall.
From your answers, I gather that it is common to wallpaper the walls even in new buildings?

thanks for your tip, I imagine it looks nice. Have you had experience with plastering work before? And how long did it take you approximately, as a pair, for e.g. a 15 sqm room?
I am apprehensive because I lack any experience and cannot assess this work :)

From your answers I gather that it is common to wallpaper walls even in new buildings?

Not really common. It is a mix of "plaster + painting," "plaster + painter’s fleece + painting," "plaster + fine plaster (and painting)," up to the simplest variant "woodchip wallpaper and painting." Although personally, I wouldn’t want woodchip wallpaper in my apartment. In my opinion, it has the charm of decades long past.

Usually not really. It's a mix of "Plaster + Painting", "Plaster + Painter's Fleece + Painting", "Plaster + Fine Plaster (and Painting)" up to the simplest variant "Woodchip wallpaper and Painting"

Exactly, that reminds me: one reason why the general contractor uses woodchip wallpaper is that the variant "Plaster + Painter's Fleece + Painting" would otherwise be significantly more expensive. Otherwise, is the variant "Plaster + Painting" without painter's fleece less stable, meaning does it hold up less well than "Plaster + Painting"?

But if special/exclusive paste is used, it contains synthetic resins, which I would prefer to avoid on my wall.

Oh, in typical house construction, the synthetic resins in the paste are the least of the problems. Besides, nice paint is applied on top of the woodchip wallpaper/fleece...

Is the "Plaster + Painting" option without painter's fleece generally less stable, so does it hold less well than "Plaster + Painting"

Sort of.
Over time, the new house tends to develop settling cracks in the plaster. This actually always happens – more or less. With painter's fleece, you don't see them, and the plaster doesn't have to be smoothed as finely. Q3/Q4 plaster is quite similar in price to the option with painter's fleece.

which are the bigger problems, Caspar? :)
(except for the insulation -with us jute/cellulose- and the glue on the windows)