When copying/moving/etc files, a user input request (eg. "File exists, replace?") should not interrupt the operation, if there are other files left to be copied. This can greatly decrease performance when copying large amounts of files where the user may or may not be asked for input during copying.

An example: Jim wants to copy lots of files, starts the operation and goes away for a cup of coffee. 10 minutes later Jim comes back, just to discover that only 120 out of the 3460 files are copyed, since file 120 already happens to exist. If this file was just pushed to the end of the queue until it received the required input, the whole process would not be delayed.