Why MS does not recommend to use memory section on the CSV volumes?

I have memory mapped file that i am using on target volume.
For CSV volume - I read from the Vladimir Petter (Microsoft) storage conference notes:
“Avoid building memory sections. Violation - stale cache and stream corruption.” at the same time one of MS guys on Build conference told that memory mapped files on CSV volumes, are supported from 2012 Windows Server.
So can I use safely memory mapped files on the CSV volumes or not?