As far as I know, I have never mentioned 60° anywhere; at the beginning, I once said >45°, but I was assuming 8.5m width. Since there is no longer a basement, that is not feasible, and a wider house with a steeper roof simply has too much roof at some point – the current 45° looks quite consistent, and the attic is clearly high enough in the middle. The attic will definitely be converted (floor and walls) and insulated. The current attic is practically an equilateral triangle with 2.2m edge length and 60°, which is just enough for a very cozy bed and currently also for a small workspace. Presumably, that is also the reason for the good feeling about an attic; maybe one can find a middle ground between a "proper" staircase as currently planned and a space-saving staircase, which definitely should not be the case.