You can still share the STL though :)

And for the OpenSCAD files I saw so far, the most important variables are usually well documented with comments at the top of the file, which makes it easier for most people how to adapt the files to their needs without knowledge of coding.

I think the biggest benefit is sharing.

While you can do parametric design in Fusion, if you share it you can only share it with people using Fusion. Same with other CAD software, you are limiting the userbase.

OpenSCAD on the other hand is a slim FOS tool that anyone can download, it’s not limited.

It’s extremely useful for functional things. Adapters and stuff. You can change some variables and get a model that fits your personal needs