Moving the chimney inside the wall - Advantages - Disadvantages?

One could also swap the chimney and the room door on the upper floor. You can easily exit the roof ridge that way.

From the ridge yes, but not from the [First]
Otherwise, that would have been my first choice as well.

still cool, why something like that always only occurs to an architect afterwards.

man könnte Schornstein und zimmertür im OG auch tauschen.

That was also the first suggestion from the architectural firm. But then downstairs on the ground floor the chimney would have stood 50 cm next to the loudspeaker. The fireplace is also still to come. That is why I rejected it right away.

As stated, it would have been like jumping out of the frying pan into the fire.