Solid works does the same thing though. Not crashing but even opening a simple model takes ages in solid works and the vast majority of things are single threaded there.

Whenever we screen share a part in solidworks, it is literally 5-10 minutes of the meeting taken up by waiting for it to complete visual operations, load things in, and assembly constrainy computing.

And you pay a shit ton of money for solidworks. Freecad also has these problems, but it is surprisingly not extremely worse than some professional cad software outside of crashing. Topo naming problem, UI, and crashing was definitely the worst thing about it. Apparently 2 of those 3 are getting fixed now.