Global Foundries claimed they would deliver mass production of 14 nm on late 2014, though. To add insult to injury, that was a forecast for only some 6 months into the future...
https://www.globalfoundries.com/news-events/press-releases/samsung-and-globalfoundries-forge-strategic-collaboration-deliver-multi
Being realistic, their pseudo 7 nm node won't be ready for AMD GPUs and CPUs until mid to late 2019, or even early 2020. And that's assuming that will be a long node suited for big CPUs and GPUs instead of a stop-gap like 20 nm on their way to 7 nm EUV.
It's entirely feasible, though it might seem unlikely, given the profusion of different nodes being promised nowadays, that AMD and maybe even Nvidia might be stuck again some 4-5 years on the same node.
At least Intel also doesn't seem to release anything beyond their 10 nm (comparable to GloFo and TSMC's 7 nm) until 2022 or so, and the 14 nm isn't that bad - only half a node behind Intel on gate and pitch size, and actually the Ryzen chips deliver a denser transitor count than the Lakes.