I think -- though I was not one of them -- that that's how people tended to use OFMs in their heyday. Like, my "home" program, the program that I'm doing most other things from, is bash, whereas I think for a lot of people on DOS systems, it was an OFM rather than command.com.
It's faster. Because I have to move directorys relatively often from different drives on my server and nemo seems to be moving the files to my local machine before moving them to their right location on the server.