> Progress bars neither justify nor require the creation of asynchronous interfaces.
How one is supposed to figure out the state of the operation?
Let's say I'm trying to copy 500gig in a single file, somewhere on the network.
Is there any way I can monitor this? Am I making any progress during the past 1.5 hours of silence, or I was cut off the net for past hour?
Progress bars can be useful, and they are not always "bars".