As structural consultant, I think SAM is one of the most interesting improvements in Archicad. In fact, I decided to work with Archicad when SAM was implemented.
My reason to use Archicad is exactly what @jl_lt suggested: I use Archicad as a consultant because my clients -architects- use Archicad. I want a softer workflow with them, using teamwork or pln instead of receiving dwg or physical ifc, because I think structural consultants cannot expect that architects give a IFC SAM or a SAF, structural consultants must do that.
That said, I think there is an important lack in SAM: it does not work with Truss Maker and Roof Maker objects. Or perhaps Truss Maker and Roof Maker should create beams instead of objects. Anyway, Archicad has not solved that issue, roofs and trusses must be made by hand if we want SAM… it is not operational.
About @Erwin Edel question, Revit has a special kind of views for structural plans, in order to solve the matter about watching structural elements over the cut plan. I still do not know how Archicad manages this, as I have started to use it some days ago 😉