> It's not a Windows-only world any more, even at the enterprise level, and active directory is no longer the unassailable fortress of big ops that it once was.
Then name the alternative.
Or tell us how to run AD without CIFS. If you cannot do either then your point about "evaluating your infrastructure" is a waste of time. You can evaluate it until you're blue in the face, but if there are no alternatives then there are no alternatives.
Heck just name a real alternative to GPO? A lot of people seem to think you can just slot in a Mac or Linux machine without any real grasp of how enterprise looks today. IBM are no doubt working on Linux deployment, but we're still likely years away, and Apple has focused more on iPads than Macs in the enterprise.
You don't want people using CIFS, but in 2016 that just isn't possible. It is mandatory for any AD environment and AD is more or less the only large scale enterprise solution. Therefore unless Microsoft redesign AD to use something other than CIFS, it isn't going away.