That explains a lot, thank you.
I would really love to see the import functionality provided in Datasmith to be integrated directly into Unreal Editor in the future, and part of the free product. In my opinion, it’s a benefit to both Epic and the user to have the ability to import as many formats as possible.
I do understand that Solidworks (for one) is mostly responsible for the shortcomings, by not offering direct FBX file exporting, but offering multiple channels for import on behalf of the Unreal Engine is definitely one way to increase the number of people using Unreal instead of their competition.