I think you answered your own question then?Because the "+" defines an improvement over a node that works. If the vanilla 10nm node is not be spoken of, then by definition 10+ is actually 10, more exactly their first 10nm working node.
The Cannon Lake based CPU needs to be searched by SKU id on Intel's CPU database, it's not listed in the 8th gen CPU list, nor is there a Cannon Lake page on Intel's site as all other codenames have. It's only purpose was to enable Intel claim their 10nm node was working, and it failed at that as well.
I was genuinely expressing doubt Intel would be using 10 NOW when it's clear they've moved to 10+, but I suppose you were aiming at triggering responses about the failure of vanilla 10nm.