When testing the Blender hair system, I was quite satisfied with how it worked. But as I increased the number of hairs the system collapsed. I have three graphic cards in my computer nvidea geforce 1080
and used them for rendering. They went on black! I had to restart and even had to reinstall the drivers for them.
I am quite pleased with Blender 2.8 until this happened. So I hope you can fix this problem in the next update.