I think its because each year the number of people that haven't upgraded for such a long time are hoping for something worth upgrading to. I'm interested, although won't be getting a Zen2 until there is a fanless motherboard. Under volting+overclocking interests me on i9. It's all very interesting. Looking forward to actual reviews.
I don't think holding out for a fanlass board is totally needed. Of course we don't know for sure just yet, but I cannot see them being that noisy under normal use, it would be suicide from the mobo makers to have them ramped up all the time and be noisy.