I run/ ran two because I had 11 sound modules hooked up. 
I don’t want to be disputatious … but realistically speaking I cannot expect Steinberg to do anything about this. I have lots of x86 hardware in the closet or out to pasture since I decided to run x64. If I really, really wanted to use some of it I’d either have to set up a dual boot system or return to my old 32 bit Cubase … where Midex8 and a lot of other things would work as they were intended.
So, again, I am simply glad the Midex8 x64 drivers mostly work and am grateful to have them.