It is more likely for nvme SSD to become mainstream before PWDIS becomes mainstream. 
 
Also if you look around for SATA crimp on cable terminal, you'll realize that all the terminals have all three pins connected from one cable. It's going to take a great deal of money to make new sheet metal forming dies. Even Molex (official manufacturer of those connectors) do not have those available yet, and EVGA definitely does not have a factory to produce these things. I think the same will apply to the 90-degree insulation displacement terminals. So it isn't likely for EVGA to implement that standard at all, until connector companies start producing those parts. Or EVGA might just include some molex to SATA connectors and call it a day, like what Seasonic did.
 
Also I agree with a corsair forum post that this standard update is pretty stupid for breaking backward compatibility with no good reasons.

I mean, active LOW wouldn't affect MOLEX to SATA users, as the pin would just float, but it would enable people with the PSUs that complied with the older SATA spec to use the drive as the pin would be tied high, and thus power disable would not be active.

If they made the pin active low this won't even become a problem.