Folks would do well to remember the 14 nm/Broadwell debacle. Basically, it was initially limited to smaller, lower clock speed chips, and so late that the desktop Broadwell SKUs got cancelled since Skylake was almost ready to ship right behind it.
I think we're seeing a much worse version of that, with 10 nm. It's good that they were able to wring so much more out of 14 nm, or Intel would be in real trouble.
BTW, it's common to start with smaller chips on a new node, until the yields improve. That's why Intel has been starting new nodes on mobile, then desktop, and finally the huge server chips.