There is no reason for anyone not to have a modeling app. There are good free ones.Wings3D, anim8tor, Blender. That's three free ones right there.

The thing is. A modeling app can't help you select those verts for constraining dynamic cloth or dynamic hair placement. The grouping tool does. It is going to take you extra time to export to a modeling app to group some polys for a material change like a second skin but the grouping tool does it right there in less time.

Sometimes I think people forget what they have and can do with it when they spend all thier time trying to use  higher end software when they don't need to.

LOL. Coming from someone that uses Modo and Vue8 infinity as much as they can. But uses the grouping tool a lot when using Poser.