Their 14nm output doesn't seem that limitless. And all that possible 14nm output won't help them getting any competitive 10nm/7nm output for which they still need to build up the capability, both at all and then on an equally large scale. Once AMD's 7nm chips reach the market Intel for the first time ever will be confronted with the pure-play foundries as direct competitors that the insane mobile market grew. And unlike with Intel for the pure-play foundries further node development doesn't depend on the success of a (comparably) small scale x86 industry.
When you look at AMD, they will have what maybe 4 dies total. 2 IO, 1 Core die, 1 GPU die? The sales to make it worth an IO die specifically for TR would be super high. Which means that probably the CPU dies between Ryzen and Epyc are also going to be really high. Plus there is only one company that can manufacturer the chips for them. On top of the Discrete GPU dies. Then add the fact that the biggest Phone and Tablet manufacturer is using 7nm chips. Then add NVidia in 2020 probably.
So its a double edged sword. 1. TR just plainly isn't going to sell enough. That isn't a theory, that is a fact. If Intel isn't creating dies specifically for the market. There is no way AMD is. TR is a niche market that can make AMD a ton of margin. But it's just never going to be worth it as a solo development system. It doesn't have to be a skunkwork product like Gen 1. But it's always going to be piggy backing off of either the desktop or server market. 2. If Intel's near limitless Manufacturing can hit a wall with demand. Even if AMD could leapfrog Intel in sales. Even if AMD was able to drum up enough demand for TR. How does TSMC not hit the wall faster on a new process with 2 active companies (with the other demanding a lot more wafers then AMD) and probably 3 more companies needing products by the end of 2019?