Its not wddm - ist just how win 10 vs 7/8 are dealing with memory(maxwell doesnt win from wddm 2.1 - for maxwell it will be lower than win7/8) - for neoscrypt it needs optimizations on win 10 ppwpddm 2.1 as well as 7/8
Based on what I've read about WDDM, I am pretty certain that is what drivers use to deal with the OS virtual memory.
The supposed 'fix' for W10 was the WDDM update, which wont be back ported to W7/8. I don't really get what you're saying though as your posts are really fragmented. I already understand the miners are broken and need to be fixed. Not exactly certain as to why they're broken though, which is what I was looking for here.
So we're back to square one two weeks ago, when people were bringing this up, which is Dagger and NeoS are still broken on W7/8 and NeoS is broken on W10, so switching to W10 wont fix these issues (switching OS's isn't a 'fix' to buggy software anyway).
Ask a administrator to switch OS's because a piece of his software is broken and he'll laugh you out of his tiny little office. This really just looks like people are trying to shift responsibility around here so things don't get fixed though... As to why? I'm not exactly certain.
Hopefully Genoil will be able to start tidying this up once he gets his 1070 as will the other developers.