Which FX series? There's two. One that crushed Intel and one that got crushed.
Compare the 6900K and the 7700K. Not working out in favour of the 6900K in single threaded either.
1800X vs 6900K would be a difficult choice if they were the same price. At half the price it isn't.
Same with the 1700(X) and the 6800K/6850K. At least the 6900K overclocks better than Zen, but even with that the 6800K/6850K don't really have a chance against 2 more (33% more) cores. That would have to be one hell of an overclock.
Single threaded nothing is going to beat the 7700K. Zen gets stuck at 4.0-4.1 GHz. Skylake-X (new 6-10 cores) most likely isnt't going to either.
So the 7700K, 7600K and 7350K are unreachable in ST. But what about stuff like the 7500? All Zen CPUs are unlocked and even with the stock cooler 4.0 GHz are doable. So as long as AMD releases a Quad Core <200$ and a Quad Core with SMT <300$ it's not looking too bad.
Crushing in MT and only losing to a handful of models ST seems pretty good, especially with these prices.
Skylake-X hasn't been released yet so we don't know how that will stack up.
BIOS are still a bit buggy which is costing Zen quite a bit of performance in anything latency bound (games).
We'll know more in late Q2.
It seems pretty even so far.