I'm sorry we've lost D3D, did some real-neat stuff...

In my experience, DSF Toolkit's OBJ conversion is slow. Okay for props and basic scenes, though does not supply a companion MTL.

Downsides, is slow, chokes on high-poly meshes. Builds, exports OBJ at 1~~2 MB / minute. I usually give up on conversions after ~20 mins, left one run to ~60 MB before aborting it. And it will not convert a multi-object environment-- At least not for me...

The alternative, exporting from DS is screaming fast. Upwards of ~20 MB per minute, and you get an MTL, too.

Sadly, DS' UI gives me a prompt migraine. You cannot 'drag & drop' DUF from an external directory into DS without getting a slew of 'missing texture' warnings. Must create library, navigate thus. Work-flow is sorta-okay, but DS directory tree's teeny-tiny font defies my efforts to enlarge unto 'readily legible'.

In my experience, 'hair' usually converts to an eye-watering poly count. When I really, really needed one baroque 'up-do', I kept the multi-mega-OBJ for 'best', ran it through a 'simplifier' to give me a 'place holder' for scene set-up and posing. YMMV.