There is lots of discussion here about OpenSCAD vs the OpenCascade family. I recently modeled a simple plaque with cadquery and was surprised how long the rendering took. A full 30+ seconds for a lathed part with text extrusion and a radial pattern of cutouts.

For me, modeling is just as much about figuring out the shape and features of an object as it is producing a STEP. I would love to model an object in a GUI then re-edit the file with code and re-render with a library, not the least reason being that GUI tools render multiple orders of magnitude faster.