If you angle the hinges a little bit slightly back from straight vertical does the whole thing flop over?
Doesn't look as k-rad if it was more practical. Of all the "no compromise" design goals I don't think sane or practical was among them.
We investigated the 3 landscape screen orientation but decided that 2x 17.3 4K Panels in portrait orientation is excellent for coding when paired with 2x 17.3 4K landscape.
It also takes up less horizontal space.
There are several other benefits when viewing large spreadsheets etc.
The heaviest components are actually placed as far as possible from the hinge. The base is also quite weighty so there is exactly zero chance of this tipping over.