I never understood all the "miner" fuss...generally speaking, that kind of power is great for games and for so-called "deep learning"...nVidia used to brag so much on CUDA--until AMD roared right past them in that department. True it inflates the price of the cards somewhat, but AMD can remedy that by introducing "miner-specific versions" of the cards that don't display like they did for the RX-480/580 series--eventually. I don't think that Crossfire is dying out. If anything, D3d12 has made it easier by hooking it into the API--but it may be awhile before game engines are built with Crossfire/SLI in mind through d3d12. However, multigpu has become less interesting, the more powerful single GPUs become. It's going to get really interesting when crossfire and sli are leveraged for more than simple frame-rates, of course. It will come,imo.