The other "decent" commercial one that can be licensed is C3D (ASCON/АСКОН uses a CAD kernel based on it in КОМПАС 3D) but it is Russian and thus currently "behind sanctions".

Here is a bit on it from the author of Plasticity: https://www.youtube.com/watch?v=WvwiH1DOK1M it initially was based on C3D.

The comparison is pretty interesting, however SolveSpace is badly misrepresented by "not parametric". In my opinion easy, stable and very flexible (the same tools are used in 2d and 3d) parametric modelling is it's greatest strength.

So I decided to redraw the model in SolveSpace fully parametric. It took me 18 minutes.

Here is the result: https://youtu.be/yUa3fnDbeWw

This is ancient news re-implemented. Windows NT had a POSIX layer up to about Windows Server 2003: https://en.wikipedia.org/wiki/Microsoft_POSIX_subsystem http://brianreiter.org/2010/08/24/the-sad-history-of-the-mic...