OpenSCAD works right now in the sense that the produced source is valid, but asking for even something well documented e.g. an AR-15 lower receiver does not impress.
We should be able to, by now, input terrain maps, account for local water ways & rainfall, and Autodesk's Brobdingnagian suite of tools should be able to spit out a whole new suburban package, engineered to local country/city engineering standards.
The main thing that's holding is back is the complexity of engineering standards, and its implementation in the software. But all that'll take is time & money.
Although the complexity of building standards is a challenge, the speed and quality of various generative algorithms are still major limitations.
I don’t know of any other multidiscipline generative design companies, but for process plant design there is OptiPlant and PipeStream. There are a lot in the architecture space but these are mostly for high level conceptual design.
In my experience many structural engineers code and use simple parametric models. Finding a company using actual generative design algorithms is still rare but there are definitely engineering teams out there who value comp.sci skills.