Only AMD knows the true reason it was dropped, but it is likely that the R9 Fury X didn't make the cut because while it is ISA compatible for the most part with Polaris, its display and media engine have aged very poorly, for example, just like Kepler it cannot output 4K at 60 Hz natively without an active DP > HDMI adapter, and even then, you need to use the 19.9.2 driver or earlier because there is a bug that causes the card to just flat out ignore the availability of higher bandwidth resolutions. It is also not able to output a 4:2:0 signal as a workaround, the display controller does not support it, something that Kepler
can do. It's also limited to h264/AVC-only encoding, for example, and has an earlier generation geometry engine vs. Polaris.
Add that to low video memory and the relatively small amount of users left, I wouldn't be surprised if they discontinued it because it isn't capable of providing a good experience with AMD's vision for future software development. I wouldn't be too angry though, it's already downlevel hardware (being only 12_0) and the final set of drivers for it are quite stable. You have an older GPU, enjoy it for what it is, IMHO.
I know.8GB vram is must have for the future.11GB vram for gtx 1080ti is blessing.I think that card will never die.....Next card will i buy is gtx 1080ti to be sure 10 years i don t have problem with game vram....
As beloved as the 1080 Ti can be, it is already well on its road to becoming obsolete, 11 GB or not. It doesn't hold its own in modern API games and it's downlevel hardware, it performs decent (not remarkable) in DX11 games and that's about it. In those it will be on the level of Navi 23. It also consumes twice as much power as the 6600 XT, while being behind in multiple areas due to the aged processor it uses, as well as incapable of handling modern graphics techniques.