+1
Yes, this is the most useful feature that lacking right now, yes I use docker and mc, mc can only support some basic op, none of these come close to Synology or even Qnap.
When I control 2 of my NAS( one DS918+ and one unraid) from remote location, I truly feel how a simple file manager set 2 OS apart, the experence is not even at same level:
I can easily serach, copy, cut and past 1000+ files in DSM via a nice web UI, with all the files transfer happening in the local machine itself, turn off my laptop and go to sleep.
in unraid it's nearly impossible, at lest I can't find a way to do that.