SLI support has already been dropped, by me. And also by plenty of other people who got sick of buying 2 cards and getting the performance of one card in that latest game.
In actual fact, I had 2 copies of that latest game because the "SLI ready" card manufacturer gifted me a game that wasn't SLI ready with each card.
Nvidia can continue to "support" SLI for as long as they like, but I won't. If a game can't run at 60fps @ my current resolution on the fastest single card available then there can only be two solutions:
1 Drop down a resolution.
2 Don't buy the game.
As I game on a ROG Swift paired with a 980Ti... My choice will be option 2. I certainly won't be buying more 980Ti's to achieve the same frame rate, or even worse... Ghosting and flickering and juddering and whatnot.