Hello Francesc! Good to see you join the thread!
The point is to be able to place the plan/section view directly(!) on the Layout, without a Detail.
As of now, vaPlanViews need to be placed into the 3d scene, and a Detail (viewport) created on a Layout to look onto it.
My point is, 2D drawings should not (necessarily) clutter the 3d scene / model space. Since they are 2d, they should go directly onto Layouts (sporting a ‘scale’ parameter) - Layouts are the dedicated 2d drawing environment in Rhino.
If there’s an extra ArchiCAD-like 2d-space needed for that like Mich said, fair enough. I’m not fully convinced though that this is really necessary. Keep it simple…
There’s another problem with placing 2d plans into the 3d scene: imagine you have created a plan view, then create a section view which by chance looks onto the plan view. You will actually see the plan view as 10000 overlapping lines in the section! Except you move the plan view somewhere off. This ‘clutters’ the 3d scene. (Also, it’s nicer to have the 2d plan sit right under the 3d model it was created from - if the plan view has to be in 3d at all).
Hope it is clear what I mean.