One question...

Theme: 3D-View

Very complex BGAs are not imported as STEP, what can I do?
"We have to use more and more large BGAs and either the corresponding STEP model cannot be imported at all or the performance in the 3D view drops enormously."

The problem is the balls of the BGAs.
Spheres and other curved surfaces are transformed into an extremely large number of small triangles in the OpenGL 3D view.

One solution could be to use a 3D editor such as FreeCAD and remove the collapsible balls from the STEP model
, if you don't really need them in the 3D view. Anyway collapsible balls are no longer present after assembly.

Another solution could be to create the 3D model in TARGET 3D syntax
instead of importing a STEP model.