Interior walls: gypsum board or OSB board?

Oh man, somehow I forgot my own thread here and totally overlooked your reply! Sorry and thanks for the hint!!

I just read through the other thread... There are really useful contributions, although people somehow disagree specifically on the load. So I didn't really understand it...

First this:

To my knowledge, gypsum fiber boards are not as load-bearing as OSB boards. That means when mounting tall cabinets and kitchens, this has to be taken into account or is limited.

Then this:

By now I actually see the advantages of the alternative and am much more relaxed: vapor permeable, just as load-bearing for hangings, non-combustible, no off-gassing, vertically load-bearing, so also structurally, statically load-bearing, more soundproof compared to OSB, more resistant to summer heat, possibility to omit foil.

And then again at the end this:

Besides, OSB is much easier when mounting shelves, pictures or other things

It somehow sounds healthier (even though I didn’t quite understand the vapor permeability either (in any case, we don’t have any foil in the wall construction)), but now, do you have to somehow think about the load when building hanging cabinets? We already want to hang some (not just in the kitchen). I once recessed the expansion plugs described by hampshire in an old apartment in a double-planked drywall. Sure, the plugs are more expensive and not quite as easy to use, but you usually don’t do it every day, so from that side it’s manageable. For all those years I somehow always had a queasy feeling about that cabinet and hoped it wouldn't come down. When moving out I removed those things myself and first realized how incredibly well they hold! Sure, now I’m not He-Man and can simulate a cabinet’s moment through the additional lever, but it wasn’t easy to pull the significantly less spread-out plug out again...

And yet I do have my concerns here about how much less force there will probably be on the OSB board...

Originally, I would have said to go with the version with one layer of OSB. Meanwhile, I would prefer to use two layers of gypsum because of material uniformity. Different materials tend to expand differently, which can lead to cracks and possibly squeaking...

Is that somehow problematic regarding the insulation if there is no separate installation wall but the thermal insulation starts directly there?
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But this is about interior walls. They are actually not insulated.

But our interior walls are also insulated with 40mm insulation. However, my question still referred to the exterior wall (which would be clad on the inside with the same type; after the two gypsum boards, the exterior insulation actually comes next, hence my question...

Originally, I would have said to take the option with one OSB. By now, I would rather take two gypsum boards, because of material uniformity. Different materials tend to expand differently, which leads to cracks and possibly creaking...

Interesting point, whether it really has relevant effects on the room side of the walls I cannot judge in turn...

But our interior walls are also insulated with 40mm insulation. However, my question still referred to the exterior wall (which would be clad on the inside with the same type, here after the two gypsum boards the exterior insulation actually comes next, hence my question...

Interesting point, whether it really has relevant effects on the room interior side of the walls I cannot judge...

You can use ESB instead of OSB. It offers a certain diffusion 'openness'.
I'm not a fan of plasterboard cladding for stud walls.
That is my personal opinion.
An 18mm wood board really holds up well!

You can use esb instead of osb. provides a certain diffusion 'openness'. I'm not a fan of drywall paneling for stud walls. That's my personal opinion. a 18mm wood panel really holds up!

I just researched that again. I found little about the diffusion resistance. Esb is supposed to handle moisture better anyway. For some reason my energy consultant recommended it to me last year when building the house. I didn't question it further. Ordered the material and processed it. It was the same price and therefore fine for me.