Just to add to this, this is a great feature to have, could we add a tagging system for export, for a simple example a car : tag a wheel parts as "wheel" and body parts as "body". Hit export obj - enter name - "myCar" and what is exported is 2 objs called "myCar_Wheel.obj" and "myCar_body.obj". This is just a simple example but when we are dealing with environments or parts that have lots of exports, we are going to have to strip them in another modeling package to make them work.
Also updating models would be easier as well - less human error on what is part of was called what and so on.
Thanks.