I love OpenSCAD for specific tasks like modeling microcontrollers against vendor datasheets. While this is not often required with commercial tools and conventional component suppliers, KiCad + chipageddon + being based in China means I've done quite a bit of that recently and it's been largely efficient, cross-platform and up to task. I am competent with Blender, but prefer OpenSCAD for this domain. Haven't really looked in to SolveSpace.