Not a problem, just will allow much more possibilities.
Export/import models with attributes that can be assigned to objects’ usertext. Is one of the best features that could be implemented.
Also as mentioned in another thread:
STEP is superior to IGES due to a mechanism implemented in Rhino to join surfaces into polysurfaces.
Currently Rhino supports only 2 STEP standards, and there are plenty more. Automotive industry is not the only one which uses Rhino!
as a matter of fact other industries use rhino much more than automotive, considering that most (if not all) of the car manufacturers use primarily CATIAv5 and CATIAv6.