Advantage in static on the upper floor

Hello everyone,
we are currently planning our house and we want to add a 1m projection over 5m width to the house on the ground floor to enlarge the living area. Now the architect told us that it would no longer be possible to install floor-to-ceiling windows on the upper floor, because the wall on the upper floor needs a structural reinforcement over these 5m, which is certainly 50cm high, I don't know the exact dimensions now. I would like to know if anyone has experience with this and if there are other solutions to keep this structural reinforcement as low as possible in height?
Regards Simon

So a 1m deep bay window on the ground floor, which continues on the upper floor? What is underneath? Free fall?

Then that already sounds problematic to me as a layman.

Just like here, only sideways without windows.

And as you can see, it is like that there too. No floor-to-ceiling windows. And to me, that also seems logical. If you want floor-to-ceiling windows 5m wide, they have to be able to support their weight somewhere. 5m wide with a ceiling thickness (20cm?) and then the weight of triple-glazed windows, that is probably hard to solve. The problem could only be reduced if you had supports again on the 5m. But a structural engineer here (or in the green forum ) should answer that, now I’m leaning too far out of the non-floor-to-ceiling window.

What can also be seen is a completely different problem aside from the statics (that should somehow work, I think, if necessary at that point insert a steel beam into the ceiling, then 20cm is enough). The drainage and "roof insulation" of the bay window is apparently so thick that no floor-to-ceiling windows fit above it! And it cannot be thinner, as the energy saving regulations must be complied with.

Hello everyone, thanks again for the answers, but I have to bring up the topic again. This morning, when I was driving to work, I saw the following. It somehow works there too. They just extended the roof at the top. For me now the question is what is cheaper, the roof on top or the drainage over the bay window? What do you think?