Under every single CAD application that businesses use is a thirty year old CAD kernel.
Even OnShape and Shapr3d, āmodernā tools use Parasolid a 30 year old beast.
We, on the other hand, are building a new CAD kernel. To use GPUs not just for rendering but for the math.
Yes, open source and hobbyists have created some newer projects in this area but they arenāt used by businesses for production products. They lack features, UX, adoption, etc.