In my workflow, slvs is only used for mechanism simulation of moving parts, which it was originally designed for on its old 2D versions, and i would handle over the more complexed solid modeling jobs to FreeCAD which owns a more capable brep kernel. If slvs wants to be a software package which works for both advanced solid modeling and mechanism simulation, it cannot be done without a complete overhaul of the geometric kernel.

By this post, I mean, after whitequark's leaving, the project needs a new plan or vision for its future functional developments, would it become more advanced in mechanism simulation, or going all the way down to other advanced solid modeling softwares like FreeCAD or CATIA, Solidworks etc.