it's a web app, free to use, but not FOSS

Onshape.com it's a little harder to start using than SketchUp, but i learned it quick enough to model and build furniture ◉⁠‿⁠◉

yes, company allows installing any OS. Also my previous employer was a University, who maintains their own flavor on Linux, which was then one of the official choices in addition to Windows and OSX.

there are a gazillion switches to control the behavior. Like, --ignore-existing, to not overwrite any existing files ...