Those are both 3D CAD programs though, and almost all CAD software supports 2D parametric sketching. I mostly just find strange though that such a ubiquitous feature in CAD, which allows for fast creation and manipulation of 2D shapes, is missing from every vector graphics tool I've used.
Yeah, it would be interesting to see the Solvespace solver ported to Inkscape as it was to Blender as CADsketcher.