You know, it wasn't long ago that Blender was a somewhat obscure open source CG/3D modeling software that was not taken super seriously for enterprise use. Blender has been around for a really long time, and there has always been a community of users and developers who improved the software over the years. Eventually it hit some sort of critical mass where it got good enough, and attracted enough attention and funding to accelerate the development (I like to think this was the 2.8 release.) This started a positive feedback cycle where it got better, attracted more attention and funding, thus improving and polishing it even further to the point where it's sponsored by practically every major tech company, and taken seriously when compared to commercial software.

So I like to think that there's hope for FreeCAD or something similar. Especially when considering how the 3D printing/maker community has become increasingly prominent. There's definitely demand for open source 3D CAD and a passionate and capable community of makers willing to make that happen. But this type of software isn't built, refined, and polished overnight.