I think that we should wait, I never heared so many negative comments from reviews than for X299. But that's not reason to choose inferior AMD products.
AMD is now inferior to Intel.
Other things is because Intel fucked up loyal customers who invest in previous years in different i7 and didn't want to say OK I drive them 7 years, now AMD is competition I will beat them and we will give 10 cores 100$ more than AMD's 8 cores. Not they give exactly close to AMD, but never enough to customers says WOW this is great now worth invest in Intel.
They fucked up with price, with thermal paste, motherboards manufacturers launch boards with single 8 pin connector and ask 40% higher price than X99 motherboard.
And that'w not everything, Intel offer i5 for Rampage VI Extreme, or 490$ worth Deluxe. i5, I don't even know specification of that model or name, when I heared i5 that was enough for me, such processors should be installed in 110$ worth mobo for people who no money to invest 280$ in i7 non K. He is now optimized for same socket as 2000$ worth Intel. And both of them have same thermal paste under IHS. That's disaster, I don't know... they eat some mushrooms probably. But that's not my concern. My concern is because Intel missed to give us i7-7820X soldered with 44 PCI-E lanes for same price as 1800X and i9 for 150$ more and because Rampage VI Extreme should cost 450$ MAX and Apex 350-380$ and than we could say Intel platform is great, they have nice improvement in single thread apps, nice memory copy, write, read performance, strong chipset with more than 20 PCI-E lanes, CPU with 44 PCI-E lanes,...
Lucky for me I choosed X99 and if 6 cores are not competitive than 8 and 10 cores are very competitive to newest processors, because with Z170 I would be shocked with improvements in multi threaded applications and Cinebench results and I would not calm down before I upgrade from i7-6700K to X299. Maybe this was last soldered platform. People still cry for Sandy Bridge, maybe is Brodwell-E last good enthusiasts CPU capable to OC well without thermal paste.
X99 worked 3 years and could work 3 more years after jump from 6 to 8 cores or 5 more with 10 cores overclocked.