Apparently they added it back after the initial release.
Support for alternate data streams was initially not implemented in ReFS. In Windows 8.1 64-bit and Server 2012 R2 the file system reacquired support for alternate data streams, with lengths of up to 128K
For example:
- If I download this using Chrome: https://aka.ms/getvsdbgps1
- Open a command prompt, cd to my Downloads directory
- Execute this:
I get: Some files I see also have a ReferrerUrl