This feature is amazing. I am running NZBget on a Raspberry Pi 4, using the RC4-MD5 Cipher and limiting the download speed to 5MB/s. Unpacking after downloading lasts some time, often up to an hour or even more. Today I enabled this feature and downloaded a 40GB file. The CPU was fast enough to keep the speed at 5MB/s and unpacking was faster than downloading. So only one minute after the last downloaded file, everything was completed!
Thank you for this software!