We've recently upgraded from 2018 Inventor to 2019 Inventor.
Now the direct Export to RFA (from Export Building Components) becomes a 2019 Revit family, where previously the 2018 Inventor Export to RFA was 2018 Revit.
I would like Autodesk to provide option to backdate the RFA save up to 3 or 4 previous releases - so for 2019 Inventor it would be good to be able to backdate to 2016 Revit.
As we know, manufacturers who use Inventor are much later in the design chain (RIBA stage 5 in England), so some Revit models can be 3-4 years old by the time manufacturers get to work on them.