Responsible? I smell confusion. You should be talking "overbinning," which is my whole point - clocking chips to within 100MHz of their lives!
The 2700x being binned (duh) doesn't mean the 9900ks isn't binned even more. AMD needed to work within the relatively tight constraints of a brand new architecture, and a 12nm node that hasn't had 4 years of increasingly desperate optimization. They designed a smart turbo scheme that gets damn near every last bit of performance out of the silicon, put it on sale, and moved on.
That last point is important. AMD is already on 7nm. They don't have to spend multiple years and hundreds of millions squeezing every drop of performance and binning for the top 0.01% of chips, because why on earth would they?
Intel can't move on, because their next node ain't working, so they're on the third release of
exactly the same chip.
Only this one isn't even available until 6 months from "launch", 5 months after AMD releases the chip it's supposed to compete with.
Because, IMHO, they just don't have the stock they need.
I wouldn't even be surprised if they quietly drop it before launch, because after 5 months of reviews for the 3800x and 3900x, a 200w 8 core silicon unicorn is going to look a whole lot less appealing.