Not sure, depends how much you can get for the card.
Okay, SLI will make a comeback at some point but changes like this are very SLOW. Measured in YEARS. I'm also taking about Split Frame Rendering (both GPU's processing the same frame) in future DX12 and Vulkan games not AFR which is what almost every game that supports SLI does.
SLI has multiple options (SFR, AFR..).
*WHY did SLI (AFR) start going away?
It's because modern game engines make this hard to use. AFR uses the same data pool for each card (in VRAM) so the cards just alternate processing each frame:
GPU1-> FRAME1,
GPU2-> FRAME2,
GPU1-> FRAME3
etc.
BUT... software dudes found they could analyze frames to make games more efficient. It's similar to video compression where multiple frames are analyzed in a row to look for similarities. There's an anti-aliasing technique that uses that; not sure what else.
Problem is you then need the SAME GPU to process consecutive frames... that's my understanding at least.
So we are in this transition where AFR is being phased out yet SFR has not yet been phased in.