I only used it for some hobby modeling, but I have to say it's fantastic and very impressive.
It seems like it's fully community-maintained, there is no big company or foundation behind it. Honestly it's hard to believe!
There was just one major problem, the infamous "topological naming problem" which caused issues downstream is you edited a non-leaf node. That was pretty frustrating to deal with, but in later releases they fixed it I think. (Have not tried it since because I didn't have anything to model)
The solution for Topological Naming Problem (TNP) was merged just before the 1.0 release. A lot of other significant changes were also merged in at the same time. Some people have reported that the UX has improved a lot since then.
I don't know much about the internal architecture of FreeCAD. As far as I know, FreeCAD does a lot of heavy lifting including managing TNP. It's supposed to be handled by the CAD kernel - OpenCASCADE in this case. I suspect that the reason why open source CAD lags behind their proprietary counterparts is really the CAD kernel. Many proprietary CAD software share the same kernel, in fact. For example, SolidWorks, Solid Edge and OnShape use Parasolid. It tells you how critical the kernel is.
Perhaps we should be focusing more on a more capable open source CAD kernel. There are a few projects around that are trying this. But they either have very limited scopes, or don't have enough support and momentum.
Not a solution, but could be one of the problems we should tell the "LLMs will replace software engineers" crowd to implement.
Maybe then they'll notice that without Open Source training data it won't be able to solve the problem.
It's possible that the training data (and research data) is already out there, just not (yet) combined into a single open source CAD kernel.
Then again, the success of such a project might depend on other factors. Given the complexity of the task, I can imagine that just "lucking into" the right design decisions early on could have a major impact.
Very much with you on this!