If you just loaded V3,4,5 .obj's meshs with out morphs or textures they would load fast.

Since the 20th century all the main app's like C4D ,Max ,LW etc etc.
used Subdivided meshes.
I've been asking for low polycount Subdivided meshes like Genesis in Poser since Poser 4.

V3,V4 where High polycount meshes cause Poser did not have SubD.
V3,V4 done what they where meant to do in Poser.
And a lot of people liked them used them.
DAZ built a empire with them.

I always had a very hard time dealing with there high polycount.

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The Artist that will fight for decades to conquer their media.
Even if you never know their name ,your know their Art.
Dark Sphere Mage Vengeance