Actually, it's a pretty quick and dirty render.  I did it in a few minutes as an example when someone asked a question here.  It's the free Genesis Hair, just made longer. 

I can't remember what the render settings were but I would guess ray tracing was off.  I don't think dynamic hair works with ray-tracing.  You need shadows on for it to look good, but ray-tracing is just way too slow.

The shader is one of the free ones from RDNA.