“Once you get past the part design workbench in [software], it becomes apparent that [software] is like 10 different software packages integrated into one.” — r53toucan on Reddit.
if you think this user is talking about FreeCAD, you're wrong. It’s CATIA — a generations-old 3D CAD program that served as an inspiration in the early days of FreeCAD. The two programs share more than just some core concepts: they’ve been struggling with many of the same issues and went in different directions to fix them.
A lot of companies that use CATIA are interested in migrating away and are looking at open-source alternatives. It's a good time to look at the reasons why and consider what they could be looking for in an open-source program such as Ondsel ES.