The launch graphic says "Ported end-to-end by Fable, an AI agent" and it definitely feels that way. Buggy, glitchy, needs some love and human eyes before it's really usable.
FreeCAD on desktop is much the same in my experience. If LLMs were mainstream a few years ago I would have assumed the UI was 100% AI generated with zero human input besides a oneshot prompt.
When was the last time that you used FreeCAD? Even 18 months ago, I would agree with you that it was a buggy mess, but I tried it a few weeks ago and it was super stable. The UI is still a little confusing, but that just comes with the domain, since AutoCAD and Fusion 360 aren't much better.
I couldn’t get the results described by the intro tutorial 3 months ago, in the parts bench drawing a polygon, snapping was broken.
If Solidworks and Onshape were born after the birth of LLMs, they'd probably be glitchy as hell.