Not to take away from your other excellent points, but ReFS is not exactly a modernization of NTFS, since it additionally removes quite a few features.[1]
The lack of disk quotas, deduplication, and named streams (and more) mean that it's not exactly a general-purpose filesystem, at least as far as standard Windows Domain deployments are concerned.
I suspect they'll address all of these issues eventually, and look forward to it, but as it stands you unfortunately can't just format everything as ReFS instead of NTFS and expect that everything will work. Unlike with ZFS.
The lack of disk quotas, deduplication, and named streams (and more) mean that it's not exactly a general-purpose filesystem, at least as far as standard Windows Domain deployments are concerned.
I suspect they'll address all of these issues eventually, and look forward to it, but as it stands you unfortunately can't just format everything as ReFS instead of NTFS and expect that everything will work. Unlike with ZFS.
[1] http://en.wikipedia.org/wiki/ReFS