Yeah, and a free alternative is the one used in Solvespace which is being packaged up for Blender:
Neither licensing option would be workable w/ our giving away a closed-source version of Carbide Create for free.
Another development in this space was:
(which I bought into at the $300 level, and after some initial experimentation and commentary gave up on 'cause the developer isn’t planning on doing the features I’d need until v3, if ever because his licensing agreement w/ the folks behind the CAD kernel which he licensed was that his program wouldn’t compete w/ normal CAD usage)
I considered using OnShape when it was first released, but kind of glad given their licensing kerfuffle — I suppose in its current state it would be workable for me (I upload everything I make to Cutrocket or Github or gitbook so that I don’t have to worry about backing up my computer), but the couple of times I’ve tried to go through their tutorials it never quite clicked, and every so often things would lag, which annoyed me.