A custom loop is just more efficient. At first it is more expensive sure but it is highly adaptable and the costs will go down in the long run.Also for threadripper there a no good closed loops.
I can confirm. I'm using Arch Linux with 58.14 kernel. I had just upgraded from a rampage iv black.I'm not sure if that error is just cosmetically.Audio works with the stereo profile, 5.1 analog is broken atm.