This is the first I've heard that "Apple is moving to SAMBA". What does that even mean? I have heard nothing about them abandoning HFS+. And OS X has supported SAMBA as a way of accessing Windows systems for a long time.
I think I'm right in saying that SAMBA is a network file access protocol that AFAIK has nothing to do with the file system on the disk, which could be HFS+ (Mac), NTFS (native Windows), FAT32 (older Microsoft), ext3 or ext4 (Linux), or even ZFS.
So the question is: which FILE SYSTEMS are supported, not which access protocols.