Some years ago I remember some people who were sure that PDF will never be a success.
I was in the crowd of those who never thought about STEP being a success, though
(back in 1995 or so...)
Jürgen, you are right about Data Exchange - if somebody´s going to work with the data, - he need to consider getting
the Step file or (better) a copy of Freecad.
But for all those people trying to share the ideas of their developers (marketing people and others) it might be more than
helpful to get an 3D Adobe file were they can easily make parts visible and invisible, change the viewpoint or the rendermodus.
Why would it help? It might wake some interest on Freecad - so my point is also a marketing one.
I do see how many things work with free software today - especially when it starts from a stick
Open Office is used on MS -(Word/ PP and Excel) documents, because of it´s better ability to export to PDF.
Freemind is nearly a standard.
And there are others which would make the list long.
I can imagine Freecad beeing used in smaller and larger companies for an ability like 3D PDF creation alone.
But honestly - in the long run it might be used because of it´s ability/price tag anyway.
I keep my thumbs pressed.