one of my favorite features in directory opus is the display of folder sizes.
xyplorer has this feature BUT it's not quite usable yet imho, because it doesnt transparently scan and update folder sizes in a background thread the way dir opus does. this is a deal breaker for me.
i'd like to see it do folder size reporting like dir opus: basically the program operates entirely normally and with no waiting, but in the background when you are in a folder it starts calculating and displaying folder sizes.. if you change directories at any time its completely seamless. so there is no reason to "cancel" from directory sizing or wait for it to complete like you do in xyplorer.