Of course, not every cm has to be planned, but a planning "measure" usually pursues a goal or aims to achieve something. Thus, the term "airspace" alone does not really say anything if it is not accompanied by a coherent concept. Only then does there really exist the danger that it might be perceived merely as a hole shot into the ceiling. I have also been in some show houses with "airspace" and felt it was done just so it could be named as a higher-value feature or a stylish special feature. In almost none of these show houses did I find it truly appealingly implemented, but rather found it stylish if an open space was available on the upper floor. If the upper floor is rather tight or only provided with a small utility corridor in front of the rooms, it also raises the question for me whether it was done half-heartedly or just to be able to call it an airspace. Without a coherent concept, an airspace alone probably only brings disadvantages. Why not, for example, a glass floor for these 6 sqm...?