Hrmm... not really, not even before an overclock. I like your suggestion that there are "true" DX12 games. They just happen to be the ones that do better on AMD, right? Like Hitman and DOOM and those are the only games people play, right? Feel free to click around this review, they have a bunch of benches that detail why the Fury X is a dead end card even more so now than when it was bitchslapped at launch by the 980 Ti:
https://www.guru3d.com/articles_pages/evga_geforce_gtx_1070_sc_superclocked_gaming_review,15.html
I guess you can hold on for dear life to DOOM Vulkan performance, but seeing as Nvidia hasn't updated their Vulkan drivers to implement async yet, it would be foolish to suggest that those results will be the same for all Vulkan games. Plus, the 1070 is the same price (within $50 at least) and literally half the power draw. And you don't have to find a spot for a radiator or deal with pump noise and, frankly, pretty shitty frametimes:
https://techreport.com/review/30413/nvidia-geforce-gtx-1070-graphics-card-reviewed/7
Check the bottom of that page and others. The Fury X stutters more than the 1070 at every single game. So maybe it gets close to average frame times, but have fun with your fits and starts. Really worth saving the $50 that you'll spend on extra electricity in a year!
You seem to think you're entitled to linear performance increases for dollar spent. That's just not how this works. AMD charges what they do because their cards are inferior. Nvidia charges what they want right now because most people are fine with a 1060 and the rest of us will buy good cards for extra money. The average person is not going to drop $1200 on a Titan XP, but isn't it nice that a 4K60 card finally exists? And Nvidia will sell it to you! AMD will give you a technically adequate solution that doesn't actually work half the time (or worse). Sure, if you can find 3 470's for MSRP (probably closer to $650-700 after tax and markup from the reference) and crossfire them, you'll get an approximation of maybe a 1080 (definitely not a Titan XP) in games that support crossfire, but the funny thing is no DX12 or Vulkan game supports crossfire at this point, except for AotS. Devs have said that they have to do all the work for multi-card now. Do you really think they're going to make three-way work, ever? And you say that's the future. So really, there is no situation where those cards are going to get a workout. That's why you can get the power so cheap by crossfiring them. Because they are going to spend most of the time stuttering and crashing in new games, and there is no work being done with multi-adapter support in DX12 games beyond AotS.
So you say you're not recommending them, but you sound pretty convinced that crossfire is useful for some odd reason. Or maybe you're just trying to justify why AMD can't even reach 75% of the Titan XP level of performance, and won't be able to until sometime next year.