I'm making an esolang which is themed after magic, is built around the KPN model of computing, and will eventually be used in a Minecraft mod.

Unfortunately I have and there is currently not any Foss alternative to solidworks. The number of extensions and features and ui automation options is crazy. I would suggest cracking it but that might not make an employer comfy

Edit: on my home computer I have been using manjaro and endeavor exclusively for a few years. I am an advocate of Foss and Linux. I hope something does become available.

I think more info was given with the examples they used though. They reveal that the problem is with copyright, where a company can both stop you from buying something from them and stop you from buying it elsewhere by still technically owning it.