It won't make a damn bit of difference for a lot of users. Most of the horrible performance I find for windows file copies (and git/svn checkouts etc) is due to

It won't make a damn bit of difference for a lot of users. Most of the horrible performance I find for windows file copies (and git/svn checkouts etc) is due to MFT contention in the filesystem rather than the network layer. This is for the "average user" scenario rather than fileserver however. This apparently hasn't gone away with ReFS either but I haven't personally tested it.