If priced properly, and with driver refinement/CF profiles, AMD could take the lead back with Vega CF. For a high end system, and possibly still saving some cash on the GPUs, this could make sense, if done properly. 3x vega could outperform 2x 1080Ti for similar price, remember CF is generally better than SLI recently. We will have to see, it will come down to drivers/price to determine if Vega is competitive.
Except all indications point to AMD putting less effort into CF and not more...
Remember their most recent comments at siggraph?
So combined with the fact that the power draw is insane, it really just doesn't make sense to hope that CF will be the saving grace.
Me, I had budgeted for CF VEga and AMD's lack of enthusiasm for CF indicates they're starting to focus on single card as well just like Nvidia.
At this point, CF/SLI really is on life support.
Unless you took something completely different from Siggraph, this is the first time I'm negative on CF support moving forward.
Edit: I'd need a new PSU for Vega CF I think. We need reviews to confirm.
This is also given you believe the latest "early leaks" of review power consumption numbers.